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Finding the Fourth Proportional to 168,763.70, 253,145.55 and 153,989.30

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Solution

The fourth proportional to 168,763.70, 253,145.55 and 153,989.30 is: 230,983.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,763.70 : 253,145.55 = 153,989.30 : x
  2. Step 2: Convert to fraction form
    168,763.70/253,145.55 = 153,989.30/x
  3. Step 3: Cross multiply
    168,763.70x = 253,145.55 × 153,989.30
  4. Step 4: Simplify right side
    168,763.70x = 38,981,706,042.62
  5. Step 5: Solve for x
    x = 38,981,706,042.62/168,763.70
  6. Step 6: Final answer
    x = 230,983.95

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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.