Home / 66,432.38-91,680.32-38,139.89

Finding the Fourth Proportional to 66,432.38, 91,680.32 and 38,139.89

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Solution

The fourth proportional to 66,432.38, 91,680.32 and 38,139.89 is: 52,635.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,432.38 : 91,680.32 = 38,139.89 : x
  2. Step 2: Convert to fraction form
    66,432.38/91,680.32 = 38,139.89/x
  3. Step 3: Cross multiply
    66,432.38x = 91,680.32 × 38,139.89
  4. Step 4: Simplify right side
    66,432.38x = 3,496,676,956.91
  5. Step 5: Solve for x
    x = 3,496,676,956.91/66,432.38
  6. Step 6: Final answer
    x = 52,635.13

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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.