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Finding the Fourth Proportional to 81,554.88, 112,544.88 and 49,721.76

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Solution

The fourth proportional to 81,554.88, 112,544.88 and 49,721.76 is: 68,615.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,554.88 : 112,544.88 = 49,721.76 : x
  2. Step 2: Convert to fraction form
    81,554.88/112,544.88 = 49,721.76/x
  3. Step 3: Cross multiply
    81,554.88x = 112,544.88 × 49,721.76
  4. Step 4: Simplify right side
    81,554.88x = 5,595,929,512.59
  5. Step 5: Solve for x
    x = 5,595,929,512.59/81,554.88
  6. Step 6: Final answer
    x = 68,615.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.