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Finding the Fourth Proportional to 129,891.60, 194,693.40 and 50,979.60

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Solution

The fourth proportional to 129,891.60, 194,693.40 and 50,979.60 is: 76,412.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,891.60 : 194,693.40 = 50,979.60 : x
  2. Step 2: Convert to fraction form
    129,891.60/194,693.40 = 50,979.60/x
  3. Step 3: Cross multiply
    129,891.60x = 194,693.40 × 50,979.60
  4. Step 4: Simplify right side
    129,891.60x = 9,925,391,654.64
  5. Step 5: Solve for x
    x = 9,925,391,654.64/129,891.60
  6. Step 6: Final answer
    x = 76,412.88

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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.