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Finding the Fourth Proportional to 146.55, 219.87 and 69.51

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Solution

The fourth proportional to 146.55, 219.87 and 69.51 is: 104.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.55 : 219.87 = 69.51 : x
  2. Step 2: Convert to fraction form
    146.55/219.87 = 69.51/x
  3. Step 3: Cross multiply
    146.55x = 219.87 × 69.51
  4. Step 4: Simplify right side
    146.55x = 15,283.16
  5. Step 5: Solve for x
    x = 15,283.16/146.55
  6. Step 6: Final answer
    x = 104.29

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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.