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Finding the Fourth Proportional to 124,694.76, 172,078.76 and 68,106.26

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Solution

The fourth proportional to 124,694.76, 172,078.76 and 68,106.26 is: 93,986.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,694.76 : 172,078.76 = 68,106.26 : x
  2. Step 2: Convert to fraction form
    124,694.76/172,078.76 = 68,106.26/x
  3. Step 3: Cross multiply
    124,694.76x = 172,078.76 × 68,106.26
  4. Step 4: Simplify right side
    124,694.76x = 11,719,640,769.04
  5. Step 5: Solve for x
    x = 11,719,640,769.04/124,694.76
  6. Step 6: Final answer
    x = 93,986.63

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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.