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Finding the Fourth Proportional to 122,163.09, 168,569.40 and 68,434.88

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Solution

The fourth proportional to 122,163.09, 168,569.40 and 68,434.88 is: 94,431.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,163.09 : 168,569.40 = 68,434.88 : x
  2. Step 2: Convert to fraction form
    122,163.09/168,569.40 = 68,434.88/x
  3. Step 3: Cross multiply
    122,163.09x = 168,569.40 × 68,434.88
  4. Step 4: Simplify right side
    122,163.09x = 11,536,026,074.46
  5. Step 5: Solve for x
    x = 11,536,026,074.46/122,163.09
  6. Step 6: Final answer
    x = 94,431.36

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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.