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Finding the Fourth Proportional to 114,990, 158,686.38 and 63,998.88

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Solution

The fourth proportional to 114,990, 158,686.38 and 63,998.88 is: 88,318.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,990 : 158,686.38 = 63,998.88 : x
  2. Step 2: Convert to fraction form
    114,990/158,686.38 = 63,998.88/x
  3. Step 3: Cross multiply
    114,990x = 158,686.38 × 63,998.88
  4. Step 4: Simplify right side
    114,990x = 10,155,750,591.25
  5. Step 5: Solve for x
    x = 10,155,750,591.25/114,990
  6. Step 6: Final answer
    x = 88,318.55

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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.