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Finding the Fourth Proportional to 80,117.99, 120,166.52 and 20,958.20

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Solution

The fourth proportional to 80,117.99, 120,166.52 and 20,958.20 is: 31,434.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,117.99 : 120,166.52 = 20,958.20 : x
  2. Step 2: Convert to fraction form
    80,117.99/120,166.52 = 20,958.20/x
  3. Step 3: Cross multiply
    80,117.99x = 120,166.52 × 20,958.20
  4. Step 4: Simplify right side
    80,117.99x = 2,518,473,253.84
  5. Step 5: Solve for x
    x = 2,518,473,253.84/80,117.99
  6. Step 6: Final answer
    x = 31,434.56

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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.