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Finding the Fourth Proportional to 96.97, 145.50 and 42.88

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Solution

The fourth proportional to 96.97, 145.50 and 42.88 is: 64.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.97 : 145.50 = 42.88 : x
  2. Step 2: Convert to fraction form
    96.97/145.50 = 42.88/x
  3. Step 3: Cross multiply
    96.97x = 145.50 × 42.88
  4. Step 4: Simplify right side
    96.97x = 6,239.04
  5. Step 5: Solve for x
    x = 6,239.04/96.97
  6. Step 6: Final answer
    x = 64.34

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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.