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Finding the Fourth Proportional to 158,487.58, 218,711.56 and 86,867.44

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Solution

The fourth proportional to 158,487.58, 218,711.56 and 86,867.44 is: 119,876.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,487.58 : 218,711.56 = 86,867.44 : x
  2. Step 2: Convert to fraction form
    158,487.58/218,711.56 = 86,867.44/x
  3. Step 3: Cross multiply
    158,487.58x = 218,711.56 × 86,867.44
  4. Step 4: Simplify right side
    158,487.58x = 18,998,913,315.61
  5. Step 5: Solve for x
    x = 18,998,913,315.61/158,487.58
  6. Step 6: Final answer
    x = 119,876.35

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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.