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Finding the Fourth Proportional to 158,540.80, 218,785.44 and 86,923.84

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Solution

The fourth proportional to 158,540.80, 218,785.44 and 86,923.84 is: 119,954.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,540.80 : 218,785.44 = 86,923.84 : x
  2. Step 2: Convert to fraction form
    158,540.80/218,785.44 = 86,923.84/x
  3. Step 3: Cross multiply
    158,540.80x = 218,785.44 × 86,923.84
  4. Step 4: Simplify right side
    158,540.80x = 19,017,670,580.89
  5. Step 5: Solve for x
    x = 19,017,670,580.89/158,540.80
  6. Step 6: Final answer
    x = 119,954.43

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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.