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Finding the Fourth Proportional to 231,129.88, 318,953.12 and 129,156.17

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Solution

The fourth proportional to 231,129.88, 318,953.12 and 129,156.17 is: 178,232.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,129.88 : 318,953.12 = 129,156.17 : x
  2. Step 2: Convert to fraction form
    231,129.88/318,953.12 = 129,156.17/x
  3. Step 3: Cross multiply
    231,129.88x = 318,953.12 × 129,156.17
  4. Step 4: Simplify right side
    231,129.88x = 41,194,765,196.03
  5. Step 5: Solve for x
    x = 41,194,765,196.03/231,129.88
  6. Step 6: Final answer
    x = 178,232.11

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