Home / 85,777.48-128,666.22-39,043.72

Finding the Fourth Proportional to 85,777.48, 128,666.22 and 39,043.72

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Solution

The fourth proportional to 85,777.48, 128,666.22 and 39,043.72 is: 58,565.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,777.48 : 128,666.22 = 39,043.72 : x
  2. Step 2: Convert to fraction form
    85,777.48/128,666.22 = 39,043.72/x
  3. Step 3: Cross multiply
    85,777.48x = 128,666.22 × 39,043.72
  4. Step 4: Simplify right side
    85,777.48x = 5,023,607,867.14
  5. Step 5: Solve for x
    x = 5,023,607,867.14/85,777.48
  6. Step 6: Final answer
    x = 58,565.58

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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.