Home / 81,375.40-121,965.90-41,912.20

Finding the Fourth Proportional to 81,375.40, 121,965.90 and 41,912.20

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Solution

The fourth proportional to 81,375.40, 121,965.90 and 41,912.20 is: 62,818.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,375.40 : 121,965.90 = 41,912.20 : x
  2. Step 2: Convert to fraction form
    81,375.40/121,965.90 = 41,912.20/x
  3. Step 3: Cross multiply
    81,375.40x = 121,965.90 × 41,912.20
  4. Step 4: Simplify right side
    81,375.40x = 5,111,859,193.98
  5. Step 5: Solve for x
    x = 5,111,859,193.98/81,375.40
  6. Step 6: Final answer
    x = 62,818.24

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1.5x scale

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.