Home / 81,734.26-121,886.12-80,986.88

Finding the Fourth Proportional to 81,734.26, 121,886.12 and 80,986.88

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Solution

The fourth proportional to 81,734.26, 121,886.12 and 80,986.88 is: 120,771.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,734.26 : 121,886.12 = 80,986.88 : x
  2. Step 2: Convert to fraction form
    81,734.26/121,886.12 = 80,986.88/x
  3. Step 3: Cross multiply
    81,734.26x = 121,886.12 × 80,986.88
  4. Step 4: Simplify right side
    81,734.26x = 9,871,176,624.22
  5. Step 5: Solve for x
    x = 9,871,176,624.22/81,734.26
  6. Step 6: Final answer
    x = 120,771.59

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1.5x scale

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.