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Finding the Fourth Proportional to 147.37, 220.81 and 108.93

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Solution

The fourth proportional to 147.37, 220.81 and 108.93 is: 163.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.37 : 220.81 = 108.93 : x
  2. Step 2: Convert to fraction form
    147.37/220.81 = 108.93/x
  3. Step 3: Cross multiply
    147.37x = 220.81 × 108.93
  4. Step 4: Simplify right side
    147.37x = 24,052.83
  5. Step 5: Solve for x
    x = 24,052.83/147.37
  6. Step 6: Final answer
    x = 163.21

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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.