Home / 87,990.24-121,394.70-57,791.94

Finding the Fourth Proportional to 87,990.24, 121,394.70 and 57,791.94

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Solution

The fourth proportional to 87,990.24, 121,394.70 and 57,791.94 is: 79,731.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,990.24 : 121,394.70 = 57,791.94 : x
  2. Step 2: Convert to fraction form
    87,990.24/121,394.70 = 57,791.94/x
  3. Step 3: Cross multiply
    87,990.24x = 121,394.70 × 57,791.94
  4. Step 4: Simplify right side
    87,990.24x = 7,015,635,218.72
  5. Step 5: Solve for x
    x = 7,015,635,218.72/87,990.24
  6. Step 6: Final answer
    x = 79,731.97

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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.