Home / 86,990.28-120,104.40-66,811.09

Finding the Fourth Proportional to 86,990.28, 120,104.40 and 66,811.09

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Solution

The fourth proportional to 86,990.28, 120,104.40 and 66,811.09 is: 92,243.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,990.28 : 120,104.40 = 66,811.09 : x
  2. Step 2: Convert to fraction form
    86,990.28/120,104.40 = 66,811.09/x
  3. Step 3: Cross multiply
    86,990.28x = 120,104.40 × 66,811.09
  4. Step 4: Simplify right side
    86,990.28x = 8,024,305,877.80
  5. Step 5: Solve for x
    x = 8,024,305,877.80/86,990.28
  6. Step 6: Final answer
    x = 92,243.71

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1.5x scale

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.