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Finding the Fourth Proportional to 158,568.60, 218,824.56 and 86,949.78

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Solution

The fourth proportional to 158,568.60, 218,824.56 and 86,949.78 is: 119,990.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,568.60 : 218,824.56 = 86,949.78 : x
  2. Step 2: Convert to fraction form
    158,568.60/218,824.56 = 86,949.78/x
  3. Step 3: Cross multiply
    158,568.60x = 218,824.56 × 86,949.78
  4. Step 4: Simplify right side
    158,568.60x = 19,026,747,350.60
  5. Step 5: Solve for x
    x = 19,026,747,350.60/158,568.60
  6. Step 6: Final answer
    x = 119,990.64

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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.