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Finding the Fourth Proportional to 81,248.45, 121,915.17 and 33,252.68

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Solution

The fourth proportional to 81,248.45, 121,915.17 and 33,252.68 is: 49,896.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,248.45 : 121,915.17 = 33,252.68 : x
  2. Step 2: Convert to fraction form
    81,248.45/121,915.17 = 33,252.68/x
  3. Step 3: Cross multiply
    81,248.45x = 121,915.17 × 33,252.68
  4. Step 4: Simplify right side
    81,248.45x = 4,054,006,315.25
  5. Step 5: Solve for x
    x = 4,054,006,315.25/81,248.45
  6. Step 6: Final answer
    x = 49,896.41

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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.