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Finding the Fourth Proportional to 138,692.57, 208,062.59 and 43,920.97

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Solution

The fourth proportional to 138,692.57, 208,062.59 and 43,920.97 is: 65,888.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,692.57 : 208,062.59 = 43,920.97 : x
  2. Step 2: Convert to fraction form
    138,692.57/208,062.59 = 43,920.97/x
  3. Step 3: Cross multiply
    138,692.57x = 208,062.59 × 43,920.97
  4. Step 4: Simplify right side
    138,692.57x = 9,138,310,033.75
  5. Step 5: Solve for x
    x = 9,138,310,033.75/138,692.57
  6. Step 6: Final answer
    x = 65,888.97

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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.