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Finding the Fourth Proportional to 85,306.56, 127,788.54 and 42,482.97

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Solution

The fourth proportional to 85,306.56, 127,788.54 and 42,482.97 is: 63,639.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,306.56 : 127,788.54 = 42,482.97 : x
  2. Step 2: Convert to fraction form
    85,306.56/127,788.54 = 42,482.97/x
  3. Step 3: Cross multiply
    85,306.56x = 127,788.54 × 42,482.97
  4. Step 4: Simplify right side
    85,306.56x = 5,428,836,711.16
  5. Step 5: Solve for x
    x = 5,428,836,711.16/85,306.56
  6. Step 6: Final answer
    x = 63,639.15

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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.