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Finding the Fourth Proportional to 129,279.78, 193,881.78 and 50,375.16

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Solution

The fourth proportional to 129,279.78, 193,881.78 and 50,375.16 is: 75,547.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,279.78 : 193,881.78 = 50,375.16 : x
  2. Step 2: Convert to fraction form
    129,279.78/193,881.78 = 50,375.16/x
  3. Step 3: Cross multiply
    129,279.78x = 193,881.78 × 50,375.16
  4. Step 4: Simplify right side
    129,279.78x = 9,766,825,688.58
  5. Step 5: Solve for x
    x = 9,766,825,688.58/129,279.78
  6. Step 6: Final answer
    x = 75,547.98

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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.