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Finding the Fourth Proportional to 129,781.76, 179,088 and 73,207.04

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Solution

The fourth proportional to 129,781.76, 179,088 and 73,207.04 is: 101,019.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,781.76 : 179,088 = 73,207.04 : x
  2. Step 2: Convert to fraction form
    129,781.76/179,088 = 73,207.04/x
  3. Step 3: Cross multiply
    129,781.76x = 179,088 × 73,207.04
  4. Step 4: Simplify right side
    129,781.76x = 13,110,502,379.52
  5. Step 5: Solve for x
    x = 13,110,502,379.52/129,781.76
  6. Step 6: Final answer
    x = 101,019.61

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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.