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Finding the Fourth Proportional to 129,891.60, 194,837.40 and 79,809.30

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Solution

The fourth proportional to 129,891.60, 194,837.40 and 79,809.30 is: 119,713.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,891.60 : 194,837.40 = 79,809.30 : x
  2. Step 2: Convert to fraction form
    129,891.60/194,837.40 = 79,809.30/x
  3. Step 3: Cross multiply
    129,891.60x = 194,837.40 × 79,809.30
  4. Step 4: Simplify right side
    129,891.60x = 15,549,836,507.82
  5. Step 5: Solve for x
    x = 15,549,836,507.82/129,891.60
  6. Step 6: Final answer
    x = 119,713.95

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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.