Home / 80,964.36-120,641.67-72,131.40

Finding the Fourth Proportional to 80,964.36, 120,641.67 and 72,131.40

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Solution

The fourth proportional to 80,964.36, 120,641.67 and 72,131.40 is: 107,480.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,964.36 : 120,641.67 = 72,131.40 : x
  2. Step 2: Convert to fraction form
    80,964.36/120,641.67 = 72,131.40/x
  3. Step 3: Cross multiply
    80,964.36x = 120,641.67 × 72,131.40
  4. Step 4: Simplify right side
    80,964.36x = 8,702,052,555.44
  5. Step 5: Solve for x
    x = 8,702,052,555.44/80,964.36
  6. Step 6: Final answer
    x = 107,480.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.