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Finding the Fourth Proportional to 159,521.80, 220,149.75 and 87,901.75

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Solution

The fourth proportional to 159,521.80, 220,149.75 and 87,901.75 is: 121,309.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,521.80 : 220,149.75 = 87,901.75 : x
  2. Step 2: Convert to fraction form
    159,521.80/220,149.75 = 87,901.75/x
  3. Step 3: Cross multiply
    159,521.80x = 220,149.75 × 87,901.75
  4. Step 4: Simplify right side
    159,521.80x = 19,351,548,287.06
  5. Step 5: Solve for x
    x = 19,351,548,287.06/159,521.80
  6. Step 6: Final answer
    x = 121,309.74

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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.