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Finding the Fourth Proportional to 159,489.81, 220,093.48 and 87,872.40

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Solution

The fourth proportional to 159,489.81, 220,093.48 and 87,872.40 is: 121,262.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,489.81 : 220,093.48 = 87,872.40 : x
  2. Step 2: Convert to fraction form
    159,489.81/220,093.48 = 87,872.40/x
  3. Step 3: Cross multiply
    159,489.81x = 220,093.48 × 87,872.40
  4. Step 4: Simplify right side
    159,489.81x = 19,340,142,311.95
  5. Step 5: Solve for x
    x = 19,340,142,311.95/159,489.81
  6. Step 6: Final answer
    x = 121,262.56

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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.