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Finding the Fourth Proportional to 122,401.82, 168,912.93 and 68,687.90

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Solution

The fourth proportional to 122,401.82, 168,912.93 and 68,687.90 is: 94,788.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,401.82 : 168,912.93 = 68,687.90 : x
  2. Step 2: Convert to fraction form
    122,401.82/168,912.93 = 68,687.90/x
  3. Step 3: Cross multiply
    122,401.82x = 168,912.93 × 68,687.90
  4. Step 4: Simplify right side
    122,401.82x = 11,602,274,444.55
  5. Step 5: Solve for x
    x = 11,602,274,444.55/122,401.82
  6. Step 6: Final answer
    x = 94,788.41

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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.