Home / 91,869.24-137,686.38-79,974.42

Finding the Fourth Proportional to 91,869.24, 137,686.38 and 79,974.42

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Solution

The fourth proportional to 91,869.24, 137,686.38 and 79,974.42 is: 119,859.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,869.24 : 137,686.38 = 79,974.42 : x
  2. Step 2: Convert to fraction form
    91,869.24/137,686.38 = 79,974.42/x
  3. Step 3: Cross multiply
    91,869.24x = 137,686.38 × 79,974.42
  4. Step 4: Simplify right side
    91,869.24x = 11,011,388,382.40
  5. Step 5: Solve for x
    x = 11,011,388,382.40/91,869.24
  6. Step 6: Final answer
    x = 119,859.36

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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.