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Finding the Fourth Proportional to 126,627.66, 174,780.72 and 78,852.78

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Solution

The fourth proportional to 126,627.66, 174,780.72 and 78,852.78 is: 108,838.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,627.66 : 174,780.72 = 78,852.78 : x
  2. Step 2: Convert to fraction form
    126,627.66/174,780.72 = 78,852.78/x
  3. Step 3: Cross multiply
    126,627.66x = 174,780.72 × 78,852.78
  4. Step 4: Simplify right side
    126,627.66x = 13,781,945,662.40
  5. Step 5: Solve for x
    x = 13,781,945,662.40/126,627.66
  6. Step 6: Final answer
    x = 108,838.35

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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.