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Finding the Fourth Proportional to 146.50, 219.80 and 65.39

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Solution

The fourth proportional to 146.50, 219.80 and 65.39 is: 98.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.50 : 219.80 = 65.39 : x
  2. Step 2: Convert to fraction form
    146.50/219.80 = 65.39/x
  3. Step 3: Cross multiply
    146.50x = 219.80 × 65.39
  4. Step 4: Simplify right side
    146.50x = 14,371.85
  5. Step 5: Solve for x
    x = 14,371.85/146.50
  6. Step 6: Final answer
    x = 98.10

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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.