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Finding the Fourth Proportional to 96.94, 145.14 and 90.73

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Solution

The fourth proportional to 96.94, 145.14 and 90.73 is: 135.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.94 : 145.14 = 90.73 : x
  2. Step 2: Convert to fraction form
    96.94/145.14 = 90.73/x
  3. Step 3: Cross multiply
    96.94x = 145.14 × 90.73
  4. Step 4: Simplify right side
    96.94x = 13,168.55
  5. Step 5: Solve for x
    x = 13,168.55/96.94
  6. Step 6: Final answer
    x = 135.84

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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.