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Finding the Fourth Proportional to 138,241.11, 207,361.47 and 43,479.61

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Solution

The fourth proportional to 138,241.11, 207,361.47 and 43,479.61 is: 65,219.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,241.11 : 207,361.47 = 43,479.61 : x
  2. Step 2: Convert to fraction form
    138,241.11/207,361.47 = 43,479.61/x
  3. Step 3: Cross multiply
    138,241.11x = 207,361.47 × 43,479.61
  4. Step 4: Simplify right side
    138,241.11x = 9,015,995,827.90
  5. Step 5: Solve for x
    x = 9,015,995,827.90/138,241.11
  6. Step 6: Final answer
    x = 65,219.36

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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.