Home / 80,474.12-120,716.58-21,309.02

Finding the Fourth Proportional to 80,474.12, 120,716.58 and 21,309.02

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Solution

The fourth proportional to 80,474.12, 120,716.58 and 21,309.02 is: 31,964.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,474.12 : 120,716.58 = 21,309.02 : x
  2. Step 2: Convert to fraction form
    80,474.12/120,716.58 = 21,309.02/x
  3. Step 3: Cross multiply
    80,474.12x = 120,716.58 × 21,309.02
  4. Step 4: Simplify right side
    80,474.12x = 2,572,352,017.55
  5. Step 5: Solve for x
    x = 2,572,352,017.55/80,474.12
  6. Step 6: Final answer
    x = 31,964.96

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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.