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Finding the Fourth Proportional to 61,142.10, 91,713.15 and 42,479.70

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Solution

The fourth proportional to 61,142.10, 91,713.15 and 42,479.70 is: 63,719.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,142.10 : 91,713.15 = 42,479.70 : x
  2. Step 2: Convert to fraction form
    61,142.10/91,713.15 = 42,479.70/x
  3. Step 3: Cross multiply
    61,142.10x = 91,713.15 × 42,479.70
  4. Step 4: Simplify right side
    61,142.10x = 3,895,947,098.06
  5. Step 5: Solve for x
    x = 3,895,947,098.06/61,142.10
  6. Step 6: Final answer
    x = 63,719.55

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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.