Home / 81,057.23-121,520.24-31,111.82

Finding the Fourth Proportional to 81,057.23, 121,520.24 and 31,111.82

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Solution

The fourth proportional to 81,057.23, 121,520.24 and 31,111.82 is: 46,642.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,057.23 : 121,520.24 = 31,111.82 : x
  2. Step 2: Convert to fraction form
    81,057.23/121,520.24 = 31,111.82/x
  3. Step 3: Cross multiply
    81,057.23x = 121,520.24 × 31,111.82
  4. Step 4: Simplify right side
    81,057.23x = 3,780,715,677.68
  5. Step 5: Solve for x
    x = 3,780,715,677.68/81,057.23
  6. Step 6: Final answer
    x = 46,642.55

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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.