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Finding the Fourth Proportional to 147.15, 219.51 and 135.41

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Solution

The fourth proportional to 147.15, 219.51 and 135.41 is: 201.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.15 : 219.51 = 135.41 : x
  2. Step 2: Convert to fraction form
    147.15/219.51 = 135.41/x
  3. Step 3: Cross multiply
    147.15x = 219.51 × 135.41
  4. Step 4: Simplify right side
    147.15x = 29,722.75
  5. Step 5: Solve for x
    x = 29,722.75/147.15
  6. Step 6: Final answer
    x = 201.99

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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.