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Finding the Fourth Proportional to 231,715.77, 319,758.90 and 129,731.69

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Solution

The fourth proportional to 231,715.77, 319,758.90 and 129,731.69 is: 179,024.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,715.77 : 319,758.90 = 129,731.69 : x
  2. Step 2: Convert to fraction form
    231,715.77/319,758.90 = 129,731.69/x
  3. Step 3: Cross multiply
    231,715.77x = 319,758.90 × 129,731.69
  4. Step 4: Simplify right side
    231,715.77x = 41,482,862,489.54
  5. Step 5: Solve for x
    x = 41,482,862,489.54/231,715.77
  6. Step 6: Final answer
    x = 179,024.77

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1.5x scale

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.