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Finding the Fourth Proportional to 136,339.30, 204,471.51 and 86,344.42

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Solution

The fourth proportional to 136,339.30, 204,471.51 and 86,344.42 is: 129,492.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,339.30 : 204,471.51 = 86,344.42 : x
  2. Step 2: Convert to fraction form
    136,339.30/204,471.51 = 86,344.42/x
  3. Step 3: Cross multiply
    136,339.30x = 204,471.51 × 86,344.42
  4. Step 4: Simplify right side
    136,339.30x = 17,654,973,937.47
  5. Step 5: Solve for x
    x = 17,654,973,937.47/136,339.30
  6. Step 6: Final answer
    x = 129,492.92

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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.