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Finding the Fourth Proportional to 111,197.75, 153,446.81 and 65,251.23

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Solution

The fourth proportional to 111,197.75, 153,446.81 and 65,251.23 is: 90,043.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,197.75 : 153,446.81 = 65,251.23 : x
  2. Step 2: Convert to fraction form
    111,197.75/153,446.81 = 65,251.23/x
  3. Step 3: Cross multiply
    111,197.75x = 153,446.81 × 65,251.23
  4. Step 4: Simplify right side
    111,197.75x = 10,012,593,092.08
  5. Step 5: Solve for x
    x = 10,012,593,092.08/111,197.75
  6. Step 6: Final answer
    x = 90,043.13

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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.