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Finding the Fourth Proportional to 115,489.50, 159,375.52 and 65,191.74

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Solution

The fourth proportional to 115,489.50, 159,375.52 and 65,191.74 is: 89,964.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,489.50 : 159,375.52 = 65,191.74 : x
  2. Step 2: Convert to fraction form
    115,489.50/159,375.52 = 65,191.74/x
  3. Step 3: Cross multiply
    115,489.50x = 159,375.52 × 65,191.74
  4. Step 4: Simplify right side
    115,489.50x = 10,389,967,462.20
  5. Step 5: Solve for x
    x = 10,389,967,462.20/115,489.50
  6. Step 6: Final answer
    x = 89,964.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.