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Finding the Fourth Proportional to 159,866.10, 239,799.17 and 81,002.88

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Solution

The fourth proportional to 159,866.10, 239,799.17 and 81,002.88 is: 121,504.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,866.10 : 239,799.17 = 81,002.88 : x
  2. Step 2: Convert to fraction form
    159,866.10/239,799.17 = 81,002.88/x
  3. Step 3: Cross multiply
    159,866.10x = 239,799.17 × 81,002.88
  4. Step 4: Simplify right side
    159,866.10x = 19,424,423,594.12
  5. Step 5: Solve for x
    x = 19,424,423,594.12/159,866.10
  6. Step 6: Final answer
    x = 121,504.33

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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.