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Finding the Fourth Proportional to 247,738.60, 371,659.74 and 81,505

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Solution

The fourth proportional to 247,738.60, 371,659.74 and 81,505 is: 122,274.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,738.60 : 371,659.74 = 81,505 : x
  2. Step 2: Convert to fraction form
    247,738.60/371,659.74 = 81,505/x
  3. Step 3: Cross multiply
    247,738.60x = 371,659.74 × 81,505
  4. Step 4: Simplify right side
    247,738.60x = 30,292,127,108.70
  5. Step 5: Solve for x
    x = 30,292,127,108.70/247,738.60
  6. Step 6: Final answer
    x = 122,274.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.