Home / 91,010.20-136,515.30-71,983.30

Finding the Fourth Proportional to 91,010.20, 136,515.30 and 71,983.30

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Solution

The fourth proportional to 91,010.20, 136,515.30 and 71,983.30 is: 107,974.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,010.20 : 136,515.30 = 71,983.30 : x
  2. Step 2: Convert to fraction form
    91,010.20/136,515.30 = 71,983.30/x
  3. Step 3: Cross multiply
    91,010.20x = 136,515.30 × 71,983.30
  4. Step 4: Simplify right side
    91,010.20x = 9,826,821,794.49
  5. Step 5: Solve for x
    x = 9,826,821,794.49/91,010.20
  6. Step 6: Final answer
    x = 107,974.95

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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.