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Finding the Fourth Proportional to 231,062.97, 318,881.86 and 129,088.98

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Solution

The fourth proportional to 231,062.97, 318,881.86 and 129,088.98 is: 178,151.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,062.97 : 318,881.86 = 129,088.98 : x
  2. Step 2: Convert to fraction form
    231,062.97/318,881.86 = 129,088.98/x
  3. Step 3: Cross multiply
    231,062.97x = 318,881.86 × 129,088.98
  4. Step 4: Simplify right side
    231,062.97x = 41,164,133,191.39
  5. Step 5: Solve for x
    x = 41,164,133,191.39/231,062.97
  6. Step 6: Final answer
    x = 178,151.15

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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.