Home / 91,949.19-137,920.03-31,991.38

Finding the Fourth Proportional to 91,949.19, 137,920.03 and 31,991.38

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Solution

The fourth proportional to 91,949.19, 137,920.03 and 31,991.38 is: 47,985.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,949.19 : 137,920.03 = 31,991.38 : x
  2. Step 2: Convert to fraction form
    91,949.19/137,920.03 = 31,991.38/x
  3. Step 3: Cross multiply
    91,949.19x = 137,920.03 × 31,991.38
  4. Step 4: Simplify right side
    91,949.19x = 4,412,251,664.56
  5. Step 5: Solve for x
    x = 4,412,251,664.56/91,949.19
  6. Step 6: Final answer
    x = 47,985.76

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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.