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Finding the Fourth Proportional to 97.21, 145.79 and 36.32

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Solution

The fourth proportional to 97.21, 145.79 and 36.32 is: 54.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.21 : 145.79 = 36.32 : x
  2. Step 2: Convert to fraction form
    97.21/145.79 = 36.32/x
  3. Step 3: Cross multiply
    97.21x = 145.79 × 36.32
  4. Step 4: Simplify right side
    97.21x = 5,295.28
  5. Step 5: Solve for x
    x = 5,295.28/97.21
  6. Step 6: Final answer
    x = 54.47

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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.