Home / 80,152.20-120,218.04-20,987.64

Finding the Fourth Proportional to 80,152.20, 120,218.04 and 20,987.64

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Solution

The fourth proportional to 80,152.20, 120,218.04 and 20,987.64 is: 31,478.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,152.20 : 120,218.04 = 20,987.64 : x
  2. Step 2: Convert to fraction form
    80,152.20/120,218.04 = 20,987.64/x
  3. Step 3: Cross multiply
    80,152.20x = 120,218.04 × 20,987.64
  4. Step 4: Simplify right side
    80,152.20x = 2,523,092,945.03
  5. Step 5: Solve for x
    x = 2,523,092,945.03/80,152.20
  6. Step 6: Final answer
    x = 31,478.77

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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.