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Finding the Fourth Proportional to 159,604.31, 220,255.49 and 87,986.90

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Solution

The fourth proportional to 159,604.31, 220,255.49 and 87,986.90 is: 121,422.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,604.31 : 220,255.49 = 87,986.90 : x
  2. Step 2: Convert to fraction form
    159,604.31/220,255.49 = 87,986.90/x
  3. Step 3: Cross multiply
    159,604.31x = 220,255.49 × 87,986.90
  4. Step 4: Simplify right side
    159,604.31x = 19,379,597,773.08
  5. Step 5: Solve for x
    x = 19,379,597,773.08/159,604.31
  6. Step 6: Final answer
    x = 121,422.77

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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.