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Finding the Fourth Proportional to 231,074.78, 318,877.30 and 129,101

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Solution

The fourth proportional to 231,074.78, 318,877.30 and 129,101 is: 178,156.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,074.78 : 318,877.30 = 129,101 : x
  2. Step 2: Convert to fraction form
    231,074.78/318,877.30 = 129,101/x
  3. Step 3: Cross multiply
    231,074.78x = 318,877.30 × 129,101
  4. Step 4: Simplify right side
    231,074.78x = 41,167,378,307.30
  5. Step 5: Solve for x
    x = 41,167,378,307.30/231,074.78
  6. Step 6: Final answer
    x = 178,156.09

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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.