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Finding the Fourth Proportional to 91,471.80, 137,207.70 and 52,105.80

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Solution

The fourth proportional to 91,471.80, 137,207.70 and 52,105.80 is: 78,158.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,471.80 : 137,207.70 = 52,105.80 : x
  2. Step 2: Convert to fraction form
    91,471.80/137,207.70 = 52,105.80/x
  3. Step 3: Cross multiply
    91,471.80x = 137,207.70 × 52,105.80
  4. Step 4: Simplify right side
    91,471.80x = 7,149,316,974.66
  5. Step 5: Solve for x
    x = 7,149,316,974.66/91,471.80
  6. Step 6: Final answer
    x = 78,158.70

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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.