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Finding the Fourth Proportional to 61,178.80, 91,768.20 and 40,251.10

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Solution

The fourth proportional to 61,178.80, 91,768.20 and 40,251.10 is: 60,376.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,178.80 : 91,768.20 = 40,251.10 : x
  2. Step 2: Convert to fraction form
    61,178.80/91,768.20 = 40,251.10/x
  3. Step 3: Cross multiply
    61,178.80x = 91,768.20 × 40,251.10
  4. Step 4: Simplify right side
    61,178.80x = 3,693,770,995.02
  5. Step 5: Solve for x
    x = 3,693,770,995.02/61,178.80
  6. Step 6: Final answer
    x = 60,376.65

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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.