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Finding the Fourth Proportional to 231,360.39, 347,081.74 and 81,687.58

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Solution

The fourth proportional to 231,360.39, 347,081.74 and 81,687.58 is: 122,545.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,360.39 : 347,081.74 = 81,687.58 : x
  2. Step 2: Convert to fraction form
    231,360.39/347,081.74 = 81,687.58/x
  3. Step 3: Cross multiply
    231,360.39x = 347,081.74 × 81,687.58
  4. Step 4: Simplify right side
    231,360.39x = 28,352,267,402.79
  5. Step 5: Solve for x
    x = 28,352,267,402.79/231,360.39
  6. Step 6: Final answer
    x = 122,545.90

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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.