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Finding the Fourth Proportional to 159,641.98, 220,315.92 and 88,021.90

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Solution

The fourth proportional to 159,641.98, 220,315.92 and 88,021.90 is: 121,475.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,641.98 : 220,315.92 = 88,021.90 : x
  2. Step 2: Convert to fraction form
    159,641.98/220,315.92 = 88,021.90/x
  3. Step 3: Cross multiply
    159,641.98x = 220,315.92 × 88,021.90
  4. Step 4: Simplify right side
    159,641.98x = 19,392,625,878.65
  5. Step 5: Solve for x
    x = 19,392,625,878.65/159,641.98
  6. Step 6: Final answer
    x = 121,475.73

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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.