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Finding the Fourth Proportional to 124,641.92, 172,009.92 and 68,057.60

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Solution

The fourth proportional to 124,641.92, 172,009.92 and 68,057.60 is: 93,921.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,641.92 : 172,009.92 = 68,057.60 : x
  2. Step 2: Convert to fraction form
    124,641.92/172,009.92 = 68,057.60/x
  3. Step 3: Cross multiply
    124,641.92x = 172,009.92 × 68,057.60
  4. Step 4: Simplify right side
    124,641.92x = 11,706,582,331.39
  5. Step 5: Solve for x
    x = 11,706,582,331.39/124,641.92
  6. Step 6: Final answer
    x = 93,921.71

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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.