Home / 80,555.76-120,778.56-38,403.36

Finding the Fourth Proportional to 80,555.76, 120,778.56 and 38,403.36

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Solution

The fourth proportional to 80,555.76, 120,778.56 and 38,403.36 is: 57,578.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,555.76 : 120,778.56 = 38,403.36 : x
  2. Step 2: Convert to fraction form
    80,555.76/120,778.56 = 38,403.36/x
  3. Step 3: Cross multiply
    80,555.76x = 120,778.56 × 38,403.36
  4. Step 4: Simplify right side
    80,555.76x = 4,638,302,519.96
  5. Step 5: Solve for x
    x = 4,638,302,519.96/80,555.76
  6. Step 6: Final answer
    x = 57,578.78

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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.