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Finding the Fourth Proportional to 91,375.80, 137,063.70 and 83,695.80

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Solution

The fourth proportional to 91,375.80, 137,063.70 and 83,695.80 is: 125,543.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,375.80 : 137,063.70 = 83,695.80 : x
  2. Step 2: Convert to fraction form
    91,375.80/137,063.70 = 83,695.80/x
  3. Step 3: Cross multiply
    91,375.80x = 137,063.70 × 83,695.80
  4. Step 4: Simplify right side
    91,375.80x = 11,471,656,022.46
  5. Step 5: Solve for x
    x = 11,471,656,022.46/91,375.80
  6. Step 6: Final answer
    x = 125,543.70

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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.