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Finding the Fourth Proportional to 231,372.80, 346,540.80 and 138,060.80

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Solution

The fourth proportional to 231,372.80, 346,540.80 and 138,060.80 is: 206,781.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,372.80 : 346,540.80 = 138,060.80 : x
  2. Step 2: Convert to fraction form
    231,372.80/346,540.80 = 138,060.80/x
  3. Step 3: Cross multiply
    231,372.80x = 346,540.80 × 138,060.80
  4. Step 4: Simplify right side
    231,372.80x = 47,843,700,080.64
  5. Step 5: Solve for x
    x = 47,843,700,080.64/231,372.80
  6. Step 6: Final answer
    x = 206,781.87

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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.