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Finding the Fourth Proportional to 60,641.28, 90,810 and 38,387.52

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Solution

The fourth proportional to 60,641.28, 90,810 and 38,387.52 is: 57,485.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,641.28 : 90,810 = 38,387.52 : x
  2. Step 2: Convert to fraction form
    60,641.28/90,810 = 38,387.52/x
  3. Step 3: Cross multiply
    60,641.28x = 90,810 × 38,387.52
  4. Step 4: Simplify right side
    60,641.28x = 3,485,970,691.20
  5. Step 5: Solve for x
    x = 3,485,970,691.20/60,641.28
  6. Step 6: Final answer
    x = 57,485.11

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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.