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Finding the Fourth Proportional to 93.28, 140.22 and 86.62

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Solution

The fourth proportional to 93.28, 140.22 and 86.62 is: 130.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.28 : 140.22 = 86.62 : x
  2. Step 2: Convert to fraction form
    93.28/140.22 = 86.62/x
  3. Step 3: Cross multiply
    93.28x = 140.22 × 86.62
  4. Step 4: Simplify right side
    93.28x = 12,145.86
  5. Step 5: Solve for x
    x = 12,145.86/93.28
  6. Step 6: Final answer
    x = 130.21

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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.