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Finding the Fourth Proportional to 268,236.80, 402,403.80 and 134,781.20

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Solution

The fourth proportional to 268,236.80, 402,403.80 and 134,781.20 is: 202,196.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,236.80 : 402,403.80 = 134,781.20 : x
  2. Step 2: Convert to fraction form
    268,236.80/402,403.80 = 134,781.20/x
  3. Step 3: Cross multiply
    268,236.80x = 402,403.80 × 134,781.20
  4. Step 4: Simplify right side
    268,236.80x = 54,236,467,048.56
  5. Step 5: Solve for x
    x = 54,236,467,048.56/268,236.80
  6. Step 6: Final answer
    x = 202,196.22

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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.