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Finding the Fourth Proportional to 146.16, 217.94 and 139.77

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Solution

The fourth proportional to 146.16, 217.94 and 139.77 is: 208.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.16 : 217.94 = 139.77 : x
  2. Step 2: Convert to fraction form
    146.16/217.94 = 139.77/x
  3. Step 3: Cross multiply
    146.16x = 217.94 × 139.77
  4. Step 4: Simplify right side
    146.16x = 30,460.77
  5. Step 5: Solve for x
    x = 30,460.77/146.16
  6. Step 6: Final answer
    x = 208.41

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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.