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Finding the Fourth Proportional to 122,463.76, 168,999.31 and 68,748.76

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Solution

The fourth proportional to 122,463.76, 168,999.31 and 68,748.76 is: 94,872.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,463.76 : 168,999.31 = 68,748.76 : x
  2. Step 2: Convert to fraction form
    122,463.76/168,999.31 = 68,748.76/x
  3. Step 3: Cross multiply
    122,463.76x = 168,999.31 × 68,748.76
  4. Step 4: Simplify right side
    122,463.76x = 11,618,493,003.36
  5. Step 5: Solve for x
    x = 11,618,493,003.36/122,463.76
  6. Step 6: Final answer
    x = 94,872.91

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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.