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Finding the Fourth Proportional to 129,843.11, 179,182.76 and 72,479.12

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Solution

The fourth proportional to 129,843.11, 179,182.76 and 72,479.12 is: 100,020.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,843.11 : 179,182.76 = 72,479.12 : x
  2. Step 2: Convert to fraction form
    129,843.11/179,182.76 = 72,479.12/x
  3. Step 3: Cross multiply
    129,843.11x = 179,182.76 × 72,479.12
  4. Step 4: Simplify right side
    129,843.11x = 12,987,007,505.66
  5. Step 5: Solve for x
    x = 12,987,007,505.66/129,843.11
  6. Step 6: Final answer
    x = 100,020.77

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1.5x scale

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.