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Finding the Fourth Proportional to 96.30, 145.13 and 90.90

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Solution

The fourth proportional to 96.30, 145.13 and 90.90 is: 136.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.30 : 145.13 = 90.90 : x
  2. Step 2: Convert to fraction form
    96.30/145.13 = 90.90/x
  3. Step 3: Cross multiply
    96.30x = 145.13 × 90.90
  4. Step 4: Simplify right side
    96.30x = 13,191.86
  5. Step 5: Solve for x
    x = 13,191.86/96.30
  6. Step 6: Final answer
    x = 136.99

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.