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Finding the Fourth Proportional to 99,286.71, 149,003.90 and 40,122.90

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Solution

The fourth proportional to 99,286.71, 149,003.90 and 40,122.90 is: 60,214.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,286.71 : 149,003.90 = 40,122.90 : x
  2. Step 2: Convert to fraction form
    99,286.71/149,003.90 = 40,122.90/x
  3. Step 3: Cross multiply
    99,286.71x = 149,003.90 × 40,122.90
  4. Step 4: Simplify right side
    99,286.71x = 5,978,467,784.14
  5. Step 5: Solve for x
    x = 5,978,467,784.14/99,286.71
  6. Step 6: Final answer
    x = 60,214.18

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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.