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Finding the Fourth Proportional to 122,980.21, 169,721.51 and 68,536.04

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Solution

The fourth proportional to 122,980.21, 169,721.51 and 68,536.04 is: 94,584.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,980.21 : 169,721.51 = 68,536.04 : x
  2. Step 2: Convert to fraction form
    122,980.21/169,721.51 = 68,536.04/x
  3. Step 3: Cross multiply
    122,980.21x = 169,721.51 × 68,536.04
  4. Step 4: Simplify right side
    122,980.21x = 11,632,040,560.57
  5. Step 5: Solve for x
    x = 11,632,040,560.57/122,980.21
  6. Step 6: Final answer
    x = 94,584.65

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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.