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Finding the Fourth Proportional to 144,067.80, 215,972.10 and 91,450.20

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Solution

The fourth proportional to 144,067.80, 215,972.10 and 91,450.20 is: 137,093.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,067.80 : 215,972.10 = 91,450.20 : x
  2. Step 2: Convert to fraction form
    144,067.80/215,972.10 = 91,450.20/x
  3. Step 3: Cross multiply
    144,067.80x = 215,972.10 × 91,450.20
  4. Step 4: Simplify right side
    144,067.80x = 19,750,691,739.42
  5. Step 5: Solve for x
    x = 19,750,691,739.42/144,067.80
  6. Step 6: Final answer
    x = 137,093.03

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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.