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Finding the Fourth Proportional to 87,791.64, 121,154.28 and 51,968.64

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Solution

The fourth proportional to 87,791.64, 121,154.28 and 51,968.64 is: 71,717.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,791.64 : 121,154.28 = 51,968.64 : x
  2. Step 2: Convert to fraction form
    87,791.64/121,154.28 = 51,968.64/x
  3. Step 3: Cross multiply
    87,791.64x = 121,154.28 × 51,968.64
  4. Step 4: Simplify right side
    87,791.64x = 6,296,223,161.78
  5. Step 5: Solve for x
    x = 6,296,223,161.78/87,791.64
  6. Step 6: Final answer
    x = 71,717.80

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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.