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Finding the Fourth Proportional to 81,418.76, 122,135.88 and 25,259.48

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Solution

The fourth proportional to 81,418.76, 122,135.88 and 25,259.48 is: 37,891.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,418.76 : 122,135.88 = 25,259.48 : x
  2. Step 2: Convert to fraction form
    81,418.76/122,135.88 = 25,259.48/x
  3. Step 3: Cross multiply
    81,418.76x = 122,135.88 × 25,259.48
  4. Step 4: Simplify right side
    81,418.76x = 3,085,088,818.14
  5. Step 5: Solve for x
    x = 3,085,088,818.14/81,418.76
  6. Step 6: Final answer
    x = 37,891.62

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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.