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Finding the Fourth Proportional to 231,675.77, 319,694.90 and 129,677.87

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Solution

The fourth proportional to 231,675.77, 319,694.90 and 129,677.87 is: 178,945.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,675.77 : 319,694.90 = 129,677.87 : x
  2. Step 2: Convert to fraction form
    231,675.77/319,694.90 = 129,677.87/x
  3. Step 3: Cross multiply
    231,675.77x = 319,694.90 × 129,677.87
  4. Step 4: Simplify right side
    231,675.77x = 41,457,351,435.00
  5. Step 5: Solve for x
    x = 41,457,351,435.00/231,675.77
  6. Step 6: Final answer
    x = 178,945.57

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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.