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Finding the Fourth Proportional to 122,187.80, 168,621.36 and 68,472.56

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Solution

The fourth proportional to 122,187.80, 168,621.36 and 68,472.56 is: 94,493.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,187.80 : 168,621.36 = 68,472.56 : x
  2. Step 2: Convert to fraction form
    122,187.80/168,621.36 = 68,472.56/x
  3. Step 3: Cross multiply
    122,187.80x = 168,621.36 × 68,472.56
  4. Step 4: Simplify right side
    122,187.80x = 11,545,936,189.88
  5. Step 5: Solve for x
    x = 11,545,936,189.88/122,187.80
  6. Step 6: Final answer
    x = 94,493.36

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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.