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Finding the Fourth Proportional to 100,472.80, 150,737.20 and 81,927.95

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Solution

The fourth proportional to 100,472.80, 150,737.20 and 81,927.95 is: 122,914.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,472.80 : 150,737.20 = 81,927.95 : x
  2. Step 2: Convert to fraction form
    100,472.80/150,737.20 = 81,927.95/x
  3. Step 3: Cross multiply
    100,472.80x = 150,737.20 × 81,927.95
  4. Step 4: Simplify right side
    100,472.80x = 12,349,589,956.76
  5. Step 5: Solve for x
    x = 12,349,589,956.76/100,472.80
  6. Step 6: Final answer
    x = 122,914.76

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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.