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Finding the Fourth Proportional to 158,386.64, 218,572.92 and 86,766.56

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Solution

The fourth proportional to 158,386.64, 218,572.92 and 86,766.56 is: 119,737.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,386.64 : 218,572.92 = 86,766.56 : x
  2. Step 2: Convert to fraction form
    158,386.64/218,572.92 = 86,766.56/x
  3. Step 3: Cross multiply
    158,386.64x = 218,572.92 × 86,766.56
  4. Step 4: Simplify right side
    158,386.64x = 18,964,820,377.56
  5. Step 5: Solve for x
    x = 18,964,820,377.56/158,386.64
  6. Step 6: Final answer
    x = 119,737.50

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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.