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Finding the Fourth Proportional to 122,034.52, 182,721.39 and 86,349.16

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Solution

The fourth proportional to 122,034.52, 182,721.39 and 86,349.16 is: 129,289.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,034.52 : 182,721.39 = 86,349.16 : x
  2. Step 2: Convert to fraction form
    122,034.52/182,721.39 = 86,349.16/x
  3. Step 3: Cross multiply
    122,034.52x = 182,721.39 × 86,349.16
  4. Step 4: Simplify right side
    122,034.52x = 15,777,838,540.53
  5. Step 5: Solve for x
    x = 15,777,838,540.53/122,034.52
  6. Step 6: Final answer
    x = 129,289.96

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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.