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Finding the Fourth Proportional to 81,351.40, 122,015.85 and 25,230.10

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Solution

The fourth proportional to 81,351.40, 122,015.85 and 25,230.10 is: 37,841.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,351.40 : 122,015.85 = 25,230.10 : x
  2. Step 2: Convert to fraction form
    81,351.40/122,015.85 = 25,230.10/x
  3. Step 3: Cross multiply
    81,351.40x = 122,015.85 × 25,230.10
  4. Step 4: Simplify right side
    81,351.40x = 3,078,472,097.09
  5. Step 5: Solve for x
    x = 3,078,472,097.09/81,351.40
  6. Step 6: Final answer
    x = 37,841.66

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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.