Home / 80,339.68-120,429.76-38,145.60

Finding the Fourth Proportional to 80,339.68, 120,429.76 and 38,145.60

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Solution

The fourth proportional to 80,339.68, 120,429.76 and 38,145.60 is: 57,180.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,339.68 : 120,429.76 = 38,145.60 : x
  2. Step 2: Convert to fraction form
    80,339.68/120,429.76 = 38,145.60/x
  3. Step 3: Cross multiply
    80,339.68x = 120,429.76 × 38,145.60
  4. Step 4: Simplify right side
    80,339.68x = 4,593,865,453.06
  5. Step 5: Solve for x
    x = 4,593,865,453.06/80,339.68
  6. Step 6: Final answer
    x = 57,180.53

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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.