Home / 80,132.31-120,189.29-20,973.69

Finding the Fourth Proportional to 80,132.31, 120,189.29 and 20,973.69

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Solution

The fourth proportional to 80,132.31, 120,189.29 and 20,973.69 is: 31,458.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,132.31 : 120,189.29 = 20,973.69 : x
  2. Step 2: Convert to fraction form
    80,132.31/120,189.29 = 20,973.69/x
  3. Step 3: Cross multiply
    80,132.31x = 120,189.29 × 20,973.69
  4. Step 4: Simplify right side
    80,132.31x = 2,520,812,804.91
  5. Step 5: Solve for x
    x = 2,520,812,804.91/80,132.31
  6. Step 6: Final answer
    x = 31,458.13

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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.