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Finding the Fourth Proportional to 158,245.93, 218,381.78 and 86,632.61

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Solution

The fourth proportional to 158,245.93, 218,381.78 and 86,632.61 is: 119,554.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,245.93 : 218,381.78 = 86,632.61 : x
  2. Step 2: Convert to fraction form
    158,245.93/218,381.78 = 86,632.61/x
  3. Step 3: Cross multiply
    158,245.93x = 218,381.78 × 86,632.61
  4. Step 4: Simplify right side
    158,245.93x = 18,918,983,577.85
  5. Step 5: Solve for x
    x = 18,918,983,577.85/158,245.93
  6. Step 6: Final answer
    x = 119,554.31

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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.