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Finding the Fourth Proportional to 81,293.92, 121,952.52 and 25,138.40

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Solution

The fourth proportional to 81,293.92, 121,952.52 and 25,138.40 is: 37,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,293.92 : 121,952.52 = 25,138.40 : x
  2. Step 2: Convert to fraction form
    81,293.92/121,952.52 = 25,138.40/x
  3. Step 3: Cross multiply
    81,293.92x = 121,952.52 × 25,138.40
  4. Step 4: Simplify right side
    81,293.92x = 3,065,691,228.77
  5. Step 5: Solve for x
    x = 3,065,691,228.77/81,293.92
  6. Step 6: Final answer
    x = 37,711.20

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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.