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Finding the Fourth Proportional to 231,864.80, 347,813.40 and 91,605.20

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Solution

The fourth proportional to 231,864.80, 347,813.40 and 91,605.20 is: 137,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,864.80 : 347,813.40 = 91,605.20 : x
  2. Step 2: Convert to fraction form
    231,864.80/347,813.40 = 91,605.20/x
  3. Step 3: Cross multiply
    231,864.80x = 347,813.40 × 91,605.20
  4. Step 4: Simplify right side
    231,864.80x = 31,861,516,069.68
  5. Step 5: Solve for x
    x = 31,861,516,069.68/231,864.80
  6. Step 6: Final answer
    x = 137,414.20

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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.