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Finding the Fourth Proportional to 87,696.64, 121,024.64 and 49,969.92

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Solution

The fourth proportional to 87,696.64, 121,024.64 and 49,969.92 is: 68,960.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,696.64 : 121,024.64 = 49,969.92 : x
  2. Step 2: Convert to fraction form
    87,696.64/121,024.64 = 49,969.92/x
  3. Step 3: Cross multiply
    87,696.64x = 121,024.64 × 49,969.92
  4. Step 4: Simplify right side
    87,696.64x = 6,047,591,578.83
  5. Step 5: Solve for x
    x = 6,047,591,578.83/87,696.64
  6. Step 6: Final answer
    x = 68,960.36

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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.