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Finding the Fourth Proportional to 129,915.72, 194,961.06 and 58,857.66

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Solution

The fourth proportional to 129,915.72, 194,961.06 and 58,857.66 is: 88,326.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,915.72 : 194,961.06 = 58,857.66 : x
  2. Step 2: Convert to fraction form
    129,915.72/194,961.06 = 58,857.66/x
  3. Step 3: Cross multiply
    129,915.72x = 194,961.06 × 58,857.66
  4. Step 4: Simplify right side
    129,915.72x = 11,474,951,782.72
  5. Step 5: Solve for x
    x = 11,474,951,782.72/129,915.72
  6. Step 6: Final answer
    x = 88,326.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.