Home / 90,991.20-136,487.12-31,826.56

Finding the Fourth Proportional to 90,991.20, 136,487.12 and 31,826.56

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Solution

The fourth proportional to 90,991.20, 136,487.12 and 31,826.56 is: 47,739.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,991.20 : 136,487.12 = 31,826.56 : x
  2. Step 2: Convert to fraction form
    90,991.20/136,487.12 = 31,826.56/x
  3. Step 3: Cross multiply
    90,991.20x = 136,487.12 × 31,826.56
  4. Step 4: Simplify right side
    90,991.20x = 4,343,915,513.91
  5. Step 5: Solve for x
    x = 4,343,915,513.91/90,991.20
  6. Step 6: Final answer
    x = 47,739.95

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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.