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Finding the Fourth Proportional to 129,991.20, 194,695.20 and 106,663.20

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Solution

The fourth proportional to 129,991.20, 194,695.20 and 106,663.20 is: 159,755.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,991.20 : 194,695.20 = 106,663.20 : x
  2. Step 2: Convert to fraction form
    129,991.20/194,695.20 = 106,663.20/x
  3. Step 3: Cross multiply
    129,991.20x = 194,695.20 × 106,663.20
  4. Step 4: Simplify right side
    129,991.20x = 20,766,813,056.64
  5. Step 5: Solve for x
    x = 20,766,813,056.64/129,991.20
  6. Step 6: Final answer
    x = 159,755.53

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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.