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Finding the Fourth Proportional to 174.48, 240.84 and 139.56

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Solution

The fourth proportional to 174.48, 240.84 and 139.56 is: 192.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.48 : 240.84 = 139.56 : x
  2. Step 2: Convert to fraction form
    174.48/240.84 = 139.56/x
  3. Step 3: Cross multiply
    174.48x = 240.84 × 139.56
  4. Step 4: Simplify right side
    174.48x = 33,611.63
  5. Step 5: Solve for x
    x = 33,611.63/174.48
  6. Step 6: Final answer
    x = 192.64

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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.