Home / 81,138.57-121,713.92-25,017.72

Finding the Fourth Proportional to 81,138.57, 121,713.92 and 25,017.72

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Solution

The fourth proportional to 81,138.57, 121,713.92 and 25,017.72 is: 37,528.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,138.57 : 121,713.92 = 25,017.72 : x
  2. Step 2: Convert to fraction form
    81,138.57/121,713.92 = 25,017.72/x
  3. Step 3: Cross multiply
    81,138.57x = 121,713.92 × 25,017.72
  4. Step 4: Simplify right side
    81,138.57x = 3,045,004,770.66
  5. Step 5: Solve for x
    x = 3,045,004,770.66/81,138.57
  6. Step 6: Final answer
    x = 37,528.45

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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.