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Finding the Fourth Proportional to 122.88, 183.15 and 117.48

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Solution

The fourth proportional to 122.88, 183.15 and 117.48 is: 175.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.88 : 183.15 = 117.48 : x
  2. Step 2: Convert to fraction form
    122.88/183.15 = 117.48/x
  3. Step 3: Cross multiply
    122.88x = 183.15 × 117.48
  4. Step 4: Simplify right side
    122.88x = 21,516.46
  5. Step 5: Solve for x
    x = 21,516.46/122.88
  6. Step 6: Final answer
    x = 175.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.