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Finding the Fourth Proportional to 80,109.90, 120,154.41 and 20,950.13

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Solution

The fourth proportional to 80,109.90, 120,154.41 and 20,950.13 is: 31,422.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,109.90 : 120,154.41 = 20,950.13 : x
  2. Step 2: Convert to fraction form
    80,109.90/120,154.41 = 20,950.13/x
  3. Step 3: Cross multiply
    80,109.90x = 120,154.41 × 20,950.13
  4. Step 4: Simplify right side
    80,109.90x = 2,517,250,809.96
  5. Step 5: Solve for x
    x = 2,517,250,809.96/80,109.90
  6. Step 6: Final answer
    x = 31,422.47

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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.