Home / 80,505.68-120,782.55-38,439.14

Finding the Fourth Proportional to 80,505.68, 120,782.55 and 38,439.14

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Solution

The fourth proportional to 80,505.68, 120,782.55 and 38,439.14 is: 57,670.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,505.68 : 120,782.55 = 38,439.14 : x
  2. Step 2: Convert to fraction form
    80,505.68/120,782.55 = 38,439.14/x
  3. Step 3: Cross multiply
    80,505.68x = 120,782.55 × 38,439.14
  4. Step 4: Simplify right side
    80,505.68x = 4,642,777,349.01
  5. Step 5: Solve for x
    x = 4,642,777,349.01/80,505.68
  6. Step 6: Final answer
    x = 57,670.18

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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.