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Finding the Fourth Proportional to 187,139.97, 280,909.72 and 80,576.67

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Solution

The fourth proportional to 187,139.97, 280,909.72 and 80,576.67 is: 120,951.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,139.97 : 280,909.72 = 80,576.67 : x
  2. Step 2: Convert to fraction form
    187,139.97/280,909.72 = 80,576.67/x
  3. Step 3: Cross multiply
    187,139.97x = 280,909.72 × 80,576.67
  4. Step 4: Simplify right side
    187,139.97x = 22,634,770,962.36
  5. Step 5: Solve for x
    x = 22,634,770,962.36/187,139.97
  6. Step 6: Final answer
    x = 120,951.02

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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.