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Finding the Fourth Proportional to 111,987.97, 154,532.16 and 68,960.57

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Solution

The fourth proportional to 111,987.97, 154,532.16 and 68,960.57 is: 95,158.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,987.97 : 154,532.16 = 68,960.57 : x
  2. Step 2: Convert to fraction form
    111,987.97/154,532.16 = 68,960.57/x
  3. Step 3: Cross multiply
    111,987.97x = 154,532.16 × 68,960.57
  4. Step 4: Simplify right side
    111,987.97x = 10,656,625,064.27
  5. Step 5: Solve for x
    x = 10,656,625,064.27/111,987.97
  6. Step 6: Final answer
    x = 95,158.66

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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.