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Finding the Fourth Proportional to 124,694.88, 172,079.84 and 68,106.25

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Solution

The fourth proportional to 124,694.88, 172,079.84 and 68,106.25 is: 93,987.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,694.88 : 172,079.84 = 68,106.25 : x
  2. Step 2: Convert to fraction form
    124,694.88/172,079.84 = 68,106.25/x
  3. Step 3: Cross multiply
    124,694.88x = 172,079.84 × 68,106.25
  4. Step 4: Simplify right side
    124,694.88x = 11,719,712,603
  5. Step 5: Solve for x
    x = 11,719,712,603/124,694.88
  6. Step 6: Final answer
    x = 93,987.12

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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.