Home / 120,399.21-166,169.88-72,659.43

Finding the Fourth Proportional to 120,399.21, 166,169.88 and 72,659.43

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Solution

The fourth proportional to 120,399.21, 166,169.88 and 72,659.43 is: 100,281.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,399.21 : 166,169.88 = 72,659.43 : x
  2. Step 2: Convert to fraction form
    120,399.21/166,169.88 = 72,659.43/x
  3. Step 3: Cross multiply
    120,399.21x = 166,169.88 × 72,659.43
  4. Step 4: Simplify right side
    120,399.21x = 12,073,808,763.97
  5. Step 5: Solve for x
    x = 12,073,808,763.97/120,399.21
  6. Step 6: Final answer
    x = 100,281.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.