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Finding the Fourth Proportional to 91,938.70, 137,908.05 and 60,445.90

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Solution

The fourth proportional to 91,938.70, 137,908.05 and 60,445.90 is: 90,668.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,938.70 : 137,908.05 = 60,445.90 : x
  2. Step 2: Convert to fraction form
    91,938.70/137,908.05 = 60,445.90/x
  3. Step 3: Cross multiply
    91,938.70x = 137,908.05 × 60,445.90
  4. Step 4: Simplify right side
    91,938.70x = 8,335,976,199.50
  5. Step 5: Solve for x
    x = 8,335,976,199.50/91,938.70
  6. Step 6: Final answer
    x = 90,668.85

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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.