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Finding the Fourth Proportional to 135,015.54, 186,374.56 and 89,067.88

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Solution

The fourth proportional to 135,015.54, 186,374.56 and 89,067.88 is: 122,948.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,015.54 : 186,374.56 = 89,067.88 : x
  2. Step 2: Convert to fraction form
    135,015.54/186,374.56 = 89,067.88/x
  3. Step 3: Cross multiply
    135,015.54x = 186,374.56 × 89,067.88
  4. Step 4: Simplify right side
    135,015.54x = 16,599,986,945.13
  5. Step 5: Solve for x
    x = 16,599,986,945.13/135,015.54
  6. Step 6: Final answer
    x = 122,948.71

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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.