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Finding the Fourth Proportional to 220,471.31, 304,241.60 and 129,831.10

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Solution

The fourth proportional to 220,471.31, 304,241.60 and 129,831.10 is: 179,161.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,471.31 : 304,241.60 = 129,831.10 : x
  2. Step 2: Convert to fraction form
    220,471.31/304,241.60 = 129,831.10/x
  3. Step 3: Cross multiply
    220,471.31x = 304,241.60 × 129,831.10
  4. Step 4: Simplify right side
    220,471.31x = 39,500,021,157.73
  5. Step 5: Solve for x
    x = 39,500,021,157.73/220,471.31
  6. Step 6: Final answer
    x = 179,161.73

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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.