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Finding the Fourth Proportional to 158,245.92, 218,379.98 and 86,632.61

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Solution

The fourth proportional to 158,245.92, 218,379.98 and 86,632.61 is: 119,553.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,245.92 : 218,379.98 = 86,632.61 : x
  2. Step 2: Convert to fraction form
    158,245.92/218,379.98 = 86,632.61/x
  3. Step 3: Cross multiply
    158,245.92x = 218,379.98 × 86,632.61
  4. Step 4: Simplify right side
    158,245.92x = 18,918,826,114.08
  5. Step 5: Solve for x
    x = 18,918,826,114.08/158,245.92
  6. Step 6: Final answer
    x = 119,553.33

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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.