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Finding the Fourth Proportional to 138,720.89, 207,954 and 49,952.86

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Solution

The fourth proportional to 138,720.89, 207,954 and 49,952.86 is: 74,883.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,720.89 : 207,954 = 49,952.86 : x
  2. Step 2: Convert to fraction form
    138,720.89/207,954 = 49,952.86/x
  3. Step 3: Cross multiply
    138,720.89x = 207,954 × 49,952.86
  4. Step 4: Simplify right side
    138,720.89x = 10,387,896,528.56
  5. Step 5: Solve for x
    x = 10,387,896,528.56/138,720.89
  6. Step 6: Final answer
    x = 74,883.43

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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.