Home / 81,140.57-121,716.92-25,019.72

Finding the Fourth Proportional to 81,140.57, 121,716.92 and 25,019.72

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Solution

The fourth proportional to 81,140.57, 121,716.92 and 25,019.72 is: 37,531.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,140.57 : 121,716.92 = 25,019.72 : x
  2. Step 2: Convert to fraction form
    81,140.57/121,716.92 = 25,019.72/x
  3. Step 3: Cross multiply
    81,140.57x = 121,716.92 × 25,019.72
  4. Step 4: Simplify right side
    81,140.57x = 3,045,323,257.66
  5. Step 5: Solve for x
    x = 3,045,323,257.66/81,140.57
  6. Step 6: Final answer
    x = 37,531.45

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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.