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Finding the Fourth Proportional to 117,957.20, 176,503.80 and 86,853.20

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Solution

The fourth proportional to 117,957.20, 176,503.80 and 86,853.20 is: 129,961.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,957.20 : 176,503.80 = 86,853.20 : x
  2. Step 2: Convert to fraction form
    117,957.20/176,503.80 = 86,853.20/x
  3. Step 3: Cross multiply
    117,957.20x = 176,503.80 × 86,853.20
  4. Step 4: Simplify right side
    117,957.20x = 15,329,919,842.16
  5. Step 5: Solve for x
    x = 15,329,919,842.16/117,957.20
  6. Step 6: Final answer
    x = 129,961.71

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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.