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Finding the Fourth Proportional to 99,716.54, 137,606.31 and 54,395.55

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Solution

The fourth proportional to 99,716.54, 137,606.31 and 54,395.55 is: 75,064.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,716.54 : 137,606.31 = 54,395.55 : x
  2. Step 2: Convert to fraction form
    99,716.54/137,606.31 = 54,395.55/x
  3. Step 3: Cross multiply
    99,716.54x = 137,606.31 × 54,395.55
  4. Step 4: Simplify right side
    99,716.54x = 7,485,170,915.92
  5. Step 5: Solve for x
    x = 7,485,170,915.92/99,716.54
  6. Step 6: Final answer
    x = 75,064.49

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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.