Home / 80,332.16-120,489.12-20,360.36

Finding the Fourth Proportional to 80,332.16, 120,489.12 and 20,360.36

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Solution

The fourth proportional to 80,332.16, 120,489.12 and 20,360.36 is: 30,538.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,332.16 : 120,489.12 = 20,360.36 : x
  2. Step 2: Convert to fraction form
    80,332.16/120,489.12 = 20,360.36/x
  3. Step 3: Cross multiply
    80,332.16x = 120,489.12 × 20,360.36
  4. Step 4: Simplify right side
    80,332.16x = 2,453,202,160.51
  5. Step 5: Solve for x
    x = 2,453,202,160.51/80,332.16
  6. Step 6: Final answer
    x = 30,538.23

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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.