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Finding the Fourth Proportional to 126,783.52, 174,961.56 and 68,640.88

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Solution

The fourth proportional to 126,783.52, 174,961.56 and 68,640.88 is: 94,724.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,783.52 : 174,961.56 = 68,640.88 : x
  2. Step 2: Convert to fraction form
    126,783.52/174,961.56 = 68,640.88/x
  3. Step 3: Cross multiply
    126,783.52x = 174,961.56 × 68,640.88
  4. Step 4: Simplify right side
    126,783.52x = 12,009,515,444.57
  5. Step 5: Solve for x
    x = 12,009,515,444.57/126,783.52
  6. Step 6: Final answer
    x = 94,724.58

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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.