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Finding the Fourth Proportional to 92,482.20, 138,723.30 and 82,640.70

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Solution

The fourth proportional to 92,482.20, 138,723.30 and 82,640.70 is: 123,961.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,482.20 : 138,723.30 = 82,640.70 : x
  2. Step 2: Convert to fraction form
    92,482.20/138,723.30 = 82,640.70/x
  3. Step 3: Cross multiply
    92,482.20x = 138,723.30 × 82,640.70
  4. Step 4: Simplify right side
    92,482.20x = 11,464,190,618.31
  5. Step 5: Solve for x
    x = 11,464,190,618.31/92,482.20
  6. Step 6: Final answer
    x = 123,961.05

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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.