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Finding the Fourth Proportional to 231,449.64, 319,416.58 and 129,508.68

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Solution

The fourth proportional to 231,449.64, 319,416.58 and 129,508.68 is: 178,730.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,449.64 : 319,416.58 = 129,508.68 : x
  2. Step 2: Convert to fraction form
    231,449.64/319,416.58 = 129,508.68/x
  3. Step 3: Cross multiply
    231,449.64x = 319,416.58 × 129,508.68
  4. Step 4: Simplify right side
    231,449.64x = 41,367,219,645.91
  5. Step 5: Solve for x
    x = 41,367,219,645.91/231,449.64
  6. Step 6: Final answer
    x = 178,730.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.