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Finding the Fourth Proportional to 220,781.25, 304,678.13 and 120,179.25

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Solution

The fourth proportional to 220,781.25, 304,678.13 and 120,179.25 is: 165,847.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,781.25 : 304,678.13 = 120,179.25 : x
  2. Step 2: Convert to fraction form
    220,781.25/304,678.13 = 120,179.25/x
  3. Step 3: Cross multiply
    220,781.25x = 304,678.13 × 120,179.25
  4. Step 4: Simplify right side
    220,781.25x = 36,615,988,553.91
  5. Step 5: Solve for x
    x = 36,615,988,553.91/220,781.25
  6. Step 6: Final answer
    x = 165,847.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.