Home / 85,548,000.80-128,322,001.20-39,489,780.80

Finding the Fourth Proportional to 85,548,000.80, 128,322,001.20 and 39,489,780.80

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Solution

The fourth proportional to 85,548,000.80, 128,322,001.20 and 39,489,780.80 is: 59,234,671.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,548,000.80 : 128,322,001.20 = 39,489,780.80 : x
  2. Step 2: Convert to fraction form
    85,548,000.80/128,322,001.20 = 39,489,780.80/x
  3. Step 3: Cross multiply
    85,548,000.80x = 128,322,001.20 × 39,489,780.80
  4. Step 4: Simplify right side
    85,548,000.80x = 5,067,407,699,205,337
  5. Step 5: Solve for x
    x = 5,067,407,699,205,337/85,548,000.80
  6. Step 6: Final answer
    x = 59,234,671.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.