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Finding the Fourth Proportional to 124,643.92, 172,012.68 and 68,059.60

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Solution

The fourth proportional to 124,643.92, 172,012.68 and 68,059.60 is: 93,924.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,643.92 : 172,012.68 = 68,059.60 : x
  2. Step 2: Convert to fraction form
    124,643.92/172,012.68 = 68,059.60/x
  3. Step 3: Cross multiply
    124,643.92x = 172,012.68 × 68,059.60
  4. Step 4: Simplify right side
    124,643.92x = 11,707,114,195.73
  5. Step 5: Solve for x
    x = 11,707,114,195.73/124,643.92
  6. Step 6: Final answer
    x = 93,924.47

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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.