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Finding the Fourth Proportional to 122.50, 183.82 and 65.50

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Solution

The fourth proportional to 122.50, 183.82 and 65.50 is: 98.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.50 : 183.82 = 65.50 : x
  2. Step 2: Convert to fraction form
    122.50/183.82 = 65.50/x
  3. Step 3: Cross multiply
    122.50x = 183.82 × 65.50
  4. Step 4: Simplify right side
    122.50x = 12,040.21
  5. Step 5: Solve for x
    x = 12,040.21/122.50
  6. Step 6: Final answer
    x = 98.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.