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Finding the Fourth Proportional to 129,754.78, 194,719.50 and 45,515.74

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Solution

The fourth proportional to 129,754.78, 194,719.50 and 45,515.74 is: 68,304.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,754.78 : 194,719.50 = 45,515.74 : x
  2. Step 2: Convert to fraction form
    129,754.78/194,719.50 = 45,515.74/x
  3. Step 3: Cross multiply
    129,754.78x = 194,719.50 × 45,515.74
  4. Step 4: Simplify right side
    129,754.78x = 8,862,802,134.93
  5. Step 5: Solve for x
    x = 8,862,802,134.93/129,754.78
  6. Step 6: Final answer
    x = 68,304.24

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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.