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Finding the Fourth Proportional to 129,958.32, 179,326.20 and 72,583.92

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Solution

The fourth proportional to 129,958.32, 179,326.20 and 72,583.92 is: 100,156.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,958.32 : 179,326.20 = 72,583.92 : x
  2. Step 2: Convert to fraction form
    129,958.32/179,326.20 = 72,583.92/x
  3. Step 3: Cross multiply
    129,958.32x = 179,326.20 × 72,583.92
  4. Step 4: Simplify right side
    129,958.32x = 13,016,198,554.70
  5. Step 5: Solve for x
    x = 13,016,198,554.70/129,958.32
  6. Step 6: Final answer
    x = 100,156.72

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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.