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Finding the Fourth Proportional to 169.41, 233.57 and 139.80

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Solution

The fourth proportional to 169.41, 233.57 and 139.80 is: 192.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.41 : 233.57 = 139.80 : x
  2. Step 2: Convert to fraction form
    169.41/233.57 = 139.80/x
  3. Step 3: Cross multiply
    169.41x = 233.57 × 139.80
  4. Step 4: Simplify right side
    169.41x = 32,653.09
  5. Step 5: Solve for x
    x = 32,653.09/169.41
  6. Step 6: Final answer
    x = 192.75

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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.