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Finding the Fourth Proportional to 127,630.95, 176,127.79 and 79,910.61

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Solution

The fourth proportional to 127,630.95, 176,127.79 and 79,910.61 is: 110,274.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,630.95 : 176,127.79 = 79,910.61 : x
  2. Step 2: Convert to fraction form
    127,630.95/176,127.79 = 79,910.61/x
  3. Step 3: Cross multiply
    127,630.95x = 176,127.79 × 79,910.61
  4. Step 4: Simplify right side
    127,630.95x = 14,074,479,136.85
  5. Step 5: Solve for x
    x = 14,074,479,136.85/127,630.95
  6. Step 6: Final answer
    x = 110,274.81

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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.