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Finding the Fourth Proportional to 174.52, 240.81 and 100.81

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Solution

The fourth proportional to 174.52, 240.81 and 100.81 is: 139.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.52 : 240.81 = 100.81 : x
  2. Step 2: Convert to fraction form
    174.52/240.81 = 100.81/x
  3. Step 3: Cross multiply
    174.52x = 240.81 × 100.81
  4. Step 4: Simplify right side
    174.52x = 24,274.85
  5. Step 5: Solve for x
    x = 24,274.85/174.52
  6. Step 6: Final answer
    x = 139.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.