Home / 81,057.96-121,629.74-57,517.61

Finding the Fourth Proportional to 81,057.96, 121,629.74 and 57,517.61

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Solution

The fourth proportional to 81,057.96, 121,629.74 and 57,517.61 is: 86,306.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,057.96 : 121,629.74 = 57,517.61 : x
  2. Step 2: Convert to fraction form
    81,057.96/121,629.74 = 57,517.61/x
  3. Step 3: Cross multiply
    81,057.96x = 121,629.74 × 57,517.61
  4. Step 4: Simplify right side
    81,057.96x = 6,995,851,053.98
  5. Step 5: Solve for x
    x = 6,995,851,053.98/81,057.96
  6. Step 6: Final answer
    x = 86,306.77

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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.