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Finding the Fourth Proportional to 122,561.20, 169,128.12 and 68,848.48

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Solution

The fourth proportional to 122,561.20, 169,128.12 and 68,848.48 is: 95,007.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,561.20 : 169,128.12 = 68,848.48 : x
  2. Step 2: Convert to fraction form
    122,561.20/169,128.12 = 68,848.48/x
  3. Step 3: Cross multiply
    122,561.20x = 169,128.12 × 68,848.48
  4. Step 4: Simplify right side
    122,561.20x = 11,644,213,987.26
  5. Step 5: Solve for x
    x = 11,644,213,987.26/122,561.20
  6. Step 6: Final answer
    x = 95,007.34

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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.