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Finding the Fourth Proportional to 91,472.70, 137,209.06 and 60,081.16

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Solution

The fourth proportional to 91,472.70, 137,209.06 and 60,081.16 is: 90,121.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,472.70 : 137,209.06 = 60,081.16 : x
  2. Step 2: Convert to fraction form
    91,472.70/137,209.06 = 60,081.16/x
  3. Step 3: Cross multiply
    91,472.70x = 137,209.06 × 60,081.16
  4. Step 4: Simplify right side
    91,472.70x = 8,243,679,487.31
  5. Step 5: Solve for x
    x = 8,243,679,487.31/91,472.70
  6. Step 6: Final answer
    x = 90,121.75

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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.