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Finding the Fourth Proportional to 96.64, 144.61 and 70.90

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Solution

The fourth proportional to 96.64, 144.61 and 70.90 is: 106.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.64 : 144.61 = 70.90 : x
  2. Step 2: Convert to fraction form
    96.64/144.61 = 70.90/x
  3. Step 3: Cross multiply
    96.64x = 144.61 × 70.90
  4. Step 4: Simplify right side
    96.64x = 10,252.13
  5. Step 5: Solve for x
    x = 10,252.13/96.64
  6. Step 6: Final answer
    x = 106.09

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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.