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Finding the Fourth Proportional to 159,990.24, 220,780.80 and 88,366.56

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Solution

The fourth proportional to 159,990.24, 220,780.80 and 88,366.56 is: 121,942.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,990.24 : 220,780.80 = 88,366.56 : x
  2. Step 2: Convert to fraction form
    159,990.24/220,780.80 = 88,366.56/x
  3. Step 3: Cross multiply
    159,990.24x = 220,780.80 × 88,366.56
  4. Step 4: Simplify right side
    159,990.24x = 19,509,639,810.05
  5. Step 5: Solve for x
    x = 19,509,639,810.05/159,990.24
  6. Step 6: Final answer
    x = 121,942.69

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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.