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Finding the Fourth Proportional to 168,781.20, 253,139.40 and 50,456.40

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Solution

The fourth proportional to 168,781.20, 253,139.40 and 50,456.40 is: 75,674.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,781.20 : 253,139.40 = 50,456.40 : x
  2. Step 2: Convert to fraction form
    168,781.20/253,139.40 = 50,456.40/x
  3. Step 3: Cross multiply
    168,781.20x = 253,139.40 × 50,456.40
  4. Step 4: Simplify right side
    168,781.20x = 12,772,502,822.16
  5. Step 5: Solve for x
    x = 12,772,502,822.16/168,781.20
  6. Step 6: Final answer
    x = 75,674.91

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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.