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Finding the Fourth Proportional to 129,129.65, 193,583.54 and 44,878.87

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Solution

The fourth proportional to 129,129.65, 193,583.54 and 44,878.87 is: 67,279.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,129.65 : 193,583.54 = 44,878.87 : x
  2. Step 2: Convert to fraction form
    129,129.65/193,583.54 = 44,878.87/x
  3. Step 3: Cross multiply
    129,129.65x = 193,583.54 × 44,878.87
  4. Step 4: Simplify right side
    129,129.65x = 8,687,810,525.80
  5. Step 5: Solve for x
    x = 8,687,810,525.80/129,129.65
  6. Step 6: Final answer
    x = 67,279.75

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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.