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Finding the Fourth Proportional to 122,655.64, 169,269.57 and 68,940.49

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Solution

The fourth proportional to 122,655.64, 169,269.57 and 68,940.49 is: 95,140.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,655.64 : 169,269.57 = 68,940.49 : x
  2. Step 2: Convert to fraction form
    122,655.64/169,269.57 = 68,940.49/x
  3. Step 3: Cross multiply
    122,655.64x = 169,269.57 × 68,940.49
  4. Step 4: Simplify right side
    122,655.64x = 11,669,527,097.89
  5. Step 5: Solve for x
    x = 11,669,527,097.89/122,655.64
  6. Step 6: Final answer
    x = 95,140.57

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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.