Home / 81,040.68-121,580.46-31,121.19

Finding the Fourth Proportional to 81,040.68, 121,580.46 and 31,121.19

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Solution

The fourth proportional to 81,040.68, 121,580.46 and 31,121.19 is: 46,689.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,040.68 : 121,580.46 = 31,121.19 : x
  2. Step 2: Convert to fraction form
    81,040.68/121,580.46 = 31,121.19/x
  3. Step 3: Cross multiply
    81,040.68x = 121,580.46 × 31,121.19
  4. Step 4: Simplify right side
    81,040.68x = 3,783,728,595.95
  5. Step 5: Solve for x
    x = 3,783,728,595.95/81,040.68
  6. Step 6: Final answer
    x = 46,689.25

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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.