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Finding the Fourth Proportional to 122,655.89, 169,269.93 and 68,940.74

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Solution

The fourth proportional to 122,655.89, 169,269.93 and 68,940.74 is: 95,140.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,655.89 : 169,269.93 = 68,940.74 : x
  2. Step 2: Convert to fraction form
    122,655.89/169,269.93 = 68,940.74/x
  3. Step 3: Cross multiply
    122,655.89x = 169,269.93 × 68,940.74
  4. Step 4: Simplify right side
    122,655.89x = 11,669,594,657.12
  5. Step 5: Solve for x
    x = 11,669,594,657.12/122,655.89
  6. Step 6: Final answer
    x = 95,140.92

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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.