Home / 80,720.58-121,079.64-36,315.96

Finding the Fourth Proportional to 80,720.58, 121,079.64 and 36,315.96

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Solution

The fourth proportional to 80,720.58, 121,079.64 and 36,315.96 is: 54,473.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,720.58 : 121,079.64 = 36,315.96 : x
  2. Step 2: Convert to fraction form
    80,720.58/121,079.64 = 36,315.96/x
  3. Step 3: Cross multiply
    80,720.58x = 121,079.64 × 36,315.96
  4. Step 4: Simplify right side
    80,720.58x = 4,397,123,363.05
  5. Step 5: Solve for x
    x = 4,397,123,363.05/80,720.58
  6. Step 6: Final answer
    x = 54,473.39

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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.