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Finding the Fourth Proportional to 96.60, 145.08 and 79.56

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Solution

The fourth proportional to 96.60, 145.08 and 79.56 is: 119.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.60 : 145.08 = 79.56 : x
  2. Step 2: Convert to fraction form
    96.60/145.08 = 79.56/x
  3. Step 3: Cross multiply
    96.60x = 145.08 × 79.56
  4. Step 4: Simplify right side
    96.60x = 11,542.56
  5. Step 5: Solve for x
    x = 11,542.56/96.60
  6. Step 6: Final answer
    x = 119.49

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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.