Home / 260,921.76-391,438.42-81,003.24

Finding the Fourth Proportional to 260,921.76, 391,438.42 and 81,003.24

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Solution

The fourth proportional to 260,921.76, 391,438.42 and 81,003.24 is: 121,522.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,921.76 : 391,438.42 = 81,003.24 : x
  2. Step 2: Convert to fraction form
    260,921.76/391,438.42 = 81,003.24/x
  3. Step 3: Cross multiply
    260,921.76x = 391,438.42 × 81,003.24
  4. Step 4: Simplify right side
    260,921.76x = 31,707,780,533.62
  5. Step 5: Solve for x
    x = 31,707,780,533.62/260,921.76
  6. Step 6: Final answer
    x = 121,522.18

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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.