Home / 85,609,813.40-128,414,720.10-54,998,811.80

Finding the Fourth Proportional to 85,609,813.40, 128,414,720.10 and 54,998,811.80

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Solution

The fourth proportional to 85,609,813.40, 128,414,720.10 and 54,998,811.80 is: 82,498,217.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,609,813.40 : 128,414,720.10 = 54,998,811.80 : x
  2. Step 2: Convert to fraction form
    85,609,813.40/128,414,720.10 = 54,998,811.80/x
  3. Step 3: Cross multiply
    85,609,813.40x = 128,414,720.10 × 54,998,811.80
  4. Step 4: Simplify right side
    85,609,813.40x = 7,062,657,023,129,576
  5. Step 5: Solve for x
    x = 7,062,657,023,129,576/85,609,813.40
  6. Step 6: Final answer
    x = 82,498,217.70

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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.