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Finding the Fourth Proportional to 84,960.70, 127,236.12 and 67,129.36

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Solution

The fourth proportional to 84,960.70, 127,236.12 and 67,129.36 is: 100,532.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,960.70 : 127,236.12 = 67,129.36 : x
  2. Step 2: Convert to fraction form
    84,960.70/127,236.12 = 67,129.36/x
  3. Step 3: Cross multiply
    84,960.70x = 127,236.12 × 67,129.36
  4. Step 4: Simplify right side
    84,960.70x = 8,541,279,304.48
  5. Step 5: Solve for x
    x = 8,541,279,304.48/84,960.70
  6. Step 6: Final answer
    x = 100,532.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.