Home / 81,260.24-121,350.36-80,380.58

Finding the Fourth Proportional to 81,260.24, 121,350.36 and 80,380.58

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Solution

The fourth proportional to 81,260.24, 121,350.36 and 80,380.58 is: 120,036.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,260.24 : 121,350.36 = 80,380.58 : x
  2. Step 2: Convert to fraction form
    81,260.24/121,350.36 = 80,380.58/x
  3. Step 3: Cross multiply
    81,260.24x = 121,350.36 × 80,380.58
  4. Step 4: Simplify right side
    81,260.24x = 9,754,211,918.11
  5. Step 5: Solve for x
    x = 9,754,211,918.11/81,260.24
  6. Step 6: Final answer
    x = 120,036.71

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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.