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Finding the Fourth Proportional to 158,553.52, 218,806.86 and 86,929.27

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Solution

The fourth proportional to 158,553.52, 218,806.86 and 86,929.27 is: 119,964.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,553.52 : 218,806.86 = 86,929.27 : x
  2. Step 2: Convert to fraction form
    158,553.52/218,806.86 = 86,929.27/x
  3. Step 3: Cross multiply
    158,553.52x = 218,806.86 × 86,929.27
  4. Step 4: Simplify right side
    158,553.52x = 19,020,720,610.79
  5. Step 5: Solve for x
    x = 19,020,720,610.79/158,553.52
  6. Step 6: Final answer
    x = 119,964.04

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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.