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Finding the Fourth Proportional to 122,172.60, 168,604.94 and 68,474.87

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Solution

The fourth proportional to 122,172.60, 168,604.94 and 68,474.87 is: 94,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,172.60 : 168,604.94 = 68,474.87 : x
  2. Step 2: Convert to fraction form
    122,172.60/168,604.94 = 68,474.87/x
  3. Step 3: Cross multiply
    122,172.60x = 168,604.94 × 68,474.87
  4. Step 4: Simplify right side
    122,172.60x = 11,545,201,308.29
  5. Step 5: Solve for x
    x = 11,545,201,308.29/122,172.60
  6. Step 6: Final answer
    x = 94,499.10

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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.