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Finding the Fourth Proportional to 96.79, 145.21 and 28.31

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Solution

The fourth proportional to 96.79, 145.21 and 28.31 is: 42.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.79 : 145.21 = 28.31 : x
  2. Step 2: Convert to fraction form
    96.79/145.21 = 28.31/x
  3. Step 3: Cross multiply
    96.79x = 145.21 × 28.31
  4. Step 4: Simplify right side
    96.79x = 4,110.90
  5. Step 5: Solve for x
    x = 4,110.90/96.79
  6. Step 6: Final answer
    x = 42.47

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.