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Finding the Fourth Proportional to 144.61, 215.74 and 131.62

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Solution

The fourth proportional to 144.61, 215.74 and 131.62 is: 196.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.61 : 215.74 = 131.62 : x
  2. Step 2: Convert to fraction form
    144.61/215.74 = 131.62/x
  3. Step 3: Cross multiply
    144.61x = 215.74 × 131.62
  4. Step 4: Simplify right side
    144.61x = 28,395.70
  5. Step 5: Solve for x
    x = 28,395.70/144.61
  6. Step 6: Final answer
    x = 196.36

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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.