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Finding the Fourth Proportional to 84,763.76, 127,169.69 and 69,116.78

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Solution

The fourth proportional to 84,763.76, 127,169.69 and 69,116.78 is: 103,694.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,763.76 : 127,169.69 = 69,116.78 : x
  2. Step 2: Convert to fraction form
    84,763.76/127,169.69 = 69,116.78/x
  3. Step 3: Cross multiply
    84,763.76x = 127,169.69 × 69,116.78
  4. Step 4: Simplify right side
    84,763.76x = 8,789,558,504.97
  5. Step 5: Solve for x
    x = 8,789,558,504.97/84,763.76
  6. Step 6: Final answer
    x = 103,694.78

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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.