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Finding the Fourth Proportional to 122.99, 168.48 and 117.45

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Solution

The fourth proportional to 122.99, 168.48 and 117.45 is: 160.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.99 : 168.48 = 117.45 : x
  2. Step 2: Convert to fraction form
    122.99/168.48 = 117.45/x
  3. Step 3: Cross multiply
    122.99x = 168.48 × 117.45
  4. Step 4: Simplify right side
    122.99x = 19,787.98
  5. Step 5: Solve for x
    x = 19,787.98/122.99
  6. Step 6: Final answer
    x = 160.90

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.