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Finding the Fourth Proportional to 122.50, 184.84 and 115.48

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Solution

The fourth proportional to 122.50, 184.84 and 115.48 is: 174.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.50 : 184.84 = 115.48 : x
  2. Step 2: Convert to fraction form
    122.50/184.84 = 115.48/x
  3. Step 3: Cross multiply
    122.50x = 184.84 × 115.48
  4. Step 4: Simplify right side
    122.50x = 21,345.32
  5. Step 5: Solve for x
    x = 21,345.32/122.50
  6. Step 6: Final answer
    x = 174.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.