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Finding the Fourth Proportional to 115,218.84, 159,022.62 and 67,469.40

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Solution

The fourth proportional to 115,218.84, 159,022.62 and 67,469.40 is: 93,119.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,218.84 : 159,022.62 = 67,469.40 : x
  2. Step 2: Convert to fraction form
    115,218.84/159,022.62 = 67,469.40/x
  3. Step 3: Cross multiply
    115,218.84x = 159,022.62 × 67,469.40
  4. Step 4: Simplify right side
    115,218.84x = 10,729,160,757.83
  5. Step 5: Solve for x
    x = 10,729,160,757.83/115,218.84
  6. Step 6: Final answer
    x = 93,119.85

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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.