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Finding the Fourth Proportional to 100,121.25, 138,167.40 and 54,799.19

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Solution

The fourth proportional to 100,121.25, 138,167.40 and 54,799.19 is: 75,622.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,121.25 : 138,167.40 = 54,799.19 : x
  2. Step 2: Convert to fraction form
    100,121.25/138,167.40 = 54,799.19/x
  3. Step 3: Cross multiply
    100,121.25x = 138,167.40 × 54,799.19
  4. Step 4: Simplify right side
    100,121.25x = 7,571,461,604.41
  5. Step 5: Solve for x
    x = 7,571,461,604.41/100,121.25
  6. Step 6: Final answer
    x = 75,622.92

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.