Home / 81,589.56-121,706.32-80,236.24

Finding the Fourth Proportional to 81,589.56, 121,706.32 and 80,236.24

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Solution

The fourth proportional to 81,589.56, 121,706.32 and 80,236.24 is: 119,687.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,589.56 : 121,706.32 = 80,236.24 : x
  2. Step 2: Convert to fraction form
    81,589.56/121,706.32 = 80,236.24/x
  3. Step 3: Cross multiply
    81,589.56x = 121,706.32 × 80,236.24
  4. Step 4: Simplify right side
    81,589.56x = 9,765,257,501.04
  5. Step 5: Solve for x
    x = 9,765,257,501.04/81,589.56
  6. Step 6: Final answer
    x = 119,687.59

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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.