Home / 81,016.80-121,525.20-71,175.30

Finding the Fourth Proportional to 81,016.80, 121,525.20 and 71,175.30

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Solution

The fourth proportional to 81,016.80, 121,525.20 and 71,175.30 is: 106,762.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,016.80 : 121,525.20 = 71,175.30 : x
  2. Step 2: Convert to fraction form
    81,016.80/121,525.20 = 71,175.30/x
  3. Step 3: Cross multiply
    81,016.80x = 121,525.20 × 71,175.30
  4. Step 4: Simplify right side
    81,016.80x = 8,649,592,567.56
  5. Step 5: Solve for x
    x = 8,649,592,567.56/81,016.80
  6. Step 6: Final answer
    x = 106,762.95

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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.