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Finding the Fourth Proportional to 159,871.20, 220,612.80 and 88,249.36

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Solution

The fourth proportional to 159,871.20, 220,612.80 and 88,249.36 is: 121,778.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,871.20 : 220,612.80 = 88,249.36 : x
  2. Step 2: Convert to fraction form
    159,871.20/220,612.80 = 88,249.36/x
  3. Step 3: Cross multiply
    159,871.20x = 220,612.80 × 88,249.36
  4. Step 4: Simplify right side
    159,871.20x = 19,468,938,407.81
  5. Step 5: Solve for x
    x = 19,468,938,407.81/159,871.20
  6. Step 6: Final answer
    x = 121,778.90

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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.