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Finding the Fourth Proportional to 124,696.50, 172,081.17 and 68,108.01

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Solution

The fourth proportional to 124,696.50, 172,081.17 and 68,108.01 is: 93,989.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,696.50 : 172,081.17 = 68,108.01 : x
  2. Step 2: Convert to fraction form
    124,696.50/172,081.17 = 68,108.01/x
  3. Step 3: Cross multiply
    124,696.50x = 172,081.17 × 68,108.01
  4. Step 4: Simplify right side
    124,696.50x = 11,720,106,047.17
  5. Step 5: Solve for x
    x = 11,720,106,047.17/124,696.50
  6. Step 6: Final answer
    x = 93,989.05

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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.