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Finding the Fourth Proportional to 71,127.69, 98,170.22 and 42,432.99

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Solution

The fourth proportional to 71,127.69, 98,170.22 and 42,432.99 is: 58,565.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,127.69 : 98,170.22 = 42,432.99 : x
  2. Step 2: Convert to fraction form
    71,127.69/98,170.22 = 42,432.99/x
  3. Step 3: Cross multiply
    71,127.69x = 98,170.22 × 42,432.99
  4. Step 4: Simplify right side
    71,127.69x = 4,165,655,963.56
  5. Step 5: Solve for x
    x = 4,165,655,963.56/71,127.69
  6. Step 6: Final answer
    x = 58,565.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.