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Finding the Fourth Proportional to 74,540.50, 102,867.76 and 40,550.90

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Solution

The fourth proportional to 74,540.50, 102,867.76 and 40,550.90 is: 55,961.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,540.50 : 102,867.76 = 40,550.90 : x
  2. Step 2: Convert to fraction form
    74,540.50/102,867.76 = 40,550.90/x
  3. Step 3: Cross multiply
    74,540.50x = 102,867.76 × 40,550.90
  4. Step 4: Simplify right side
    74,540.50x = 4,171,380,248.98
  5. Step 5: Solve for x
    x = 4,171,380,248.98/74,540.50
  6. Step 6: Final answer
    x = 55,961.26

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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.