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Finding the Fourth Proportional to 231,044.21, 318,829.62 and 129,049.37

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Solution

The fourth proportional to 231,044.21, 318,829.62 and 129,049.37 is: 178,081.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,044.21 : 318,829.62 = 129,049.37 : x
  2. Step 2: Convert to fraction form
    231,044.21/318,829.62 = 129,049.37/x
  3. Step 3: Cross multiply
    231,044.21x = 318,829.62 × 129,049.37
  4. Step 4: Simplify right side
    231,044.21x = 41,144,760,957.83
  5. Step 5: Solve for x
    x = 41,144,760,957.83/231,044.21
  6. Step 6: Final answer
    x = 178,081.76

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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.