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Finding the Fourth Proportional to 100,640.67, 138,891.37 and 60,353.70

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Solution

The fourth proportional to 100,640.67, 138,891.37 and 60,353.70 is: 83,292.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,640.67 : 138,891.37 = 60,353.70 : x
  2. Step 2: Convert to fraction form
    100,640.67/138,891.37 = 60,353.70/x
  3. Step 3: Cross multiply
    100,640.67x = 138,891.37 × 60,353.70
  4. Step 4: Simplify right side
    100,640.67x = 8,382,608,077.57
  5. Step 5: Solve for x
    x = 8,382,608,077.57/100,640.67
  6. Step 6: Final answer
    x = 83,292.45

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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.