Home / 80,154.12-120,226.32-20,988.48

Finding the Fourth Proportional to 80,154.12, 120,226.32 and 20,988.48

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Solution

The fourth proportional to 80,154.12, 120,226.32 and 20,988.48 is: 31,481.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,154.12 : 120,226.32 = 20,988.48 : x
  2. Step 2: Convert to fraction form
    80,154.12/120,226.32 = 20,988.48/x
  3. Step 3: Cross multiply
    80,154.12x = 120,226.32 × 20,988.48
  4. Step 4: Simplify right side
    80,154.12x = 2,523,367,712.79
  5. Step 5: Solve for x
    x = 2,523,367,712.79/80,154.12
  6. Step 6: Final answer
    x = 31,481.45

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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.