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Finding the Fourth Proportional to 91,839.80, 137,613.90 and 60,638.60

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Solution

The fourth proportional to 91,839.80, 137,613.90 and 60,638.60 is: 90,861.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,839.80 : 137,613.90 = 60,638.60 : x
  2. Step 2: Convert to fraction form
    91,839.80/137,613.90 = 60,638.60/x
  3. Step 3: Cross multiply
    91,839.80x = 137,613.90 × 60,638.60
  4. Step 4: Simplify right side
    91,839.80x = 8,344,714,236.54
  5. Step 5: Solve for x
    x = 8,344,714,236.54/91,839.80
  6. Step 6: Final answer
    x = 90,861.63

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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.