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Finding the Fourth Proportional to 129,879.68, 179,233.92 and 73,290.88

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Solution

The fourth proportional to 129,879.68, 179,233.92 and 73,290.88 is: 101,141.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,879.68 : 179,233.92 = 73,290.88 : x
  2. Step 2: Convert to fraction form
    129,879.68/179,233.92 = 73,290.88/x
  3. Step 3: Cross multiply
    129,879.68x = 179,233.92 × 73,290.88
  4. Step 4: Simplify right side
    129,879.68x = 13,136,211,722.65
  5. Step 5: Solve for x
    x = 13,136,211,722.65/129,879.68
  6. Step 6: Final answer
    x = 101,141.39

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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.