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Finding the Fourth Proportional to 168,153.06, 251,704.70 and 120,687.90

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Solution

The fourth proportional to 168,153.06, 251,704.70 and 120,687.90 is: 180,655.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,153.06 : 251,704.70 = 120,687.90 : x
  2. Step 2: Convert to fraction form
    168,153.06/251,704.70 = 120,687.90/x
  3. Step 3: Cross multiply
    168,153.06x = 251,704.70 × 120,687.90
  4. Step 4: Simplify right side
    168,153.06x = 30,377,711,663.13
  5. Step 5: Solve for x
    x = 30,377,711,663.13/168,153.06
  6. Step 6: Final answer
    x = 180,655.12

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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.