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Finding the Fourth Proportional to 93.49, 129.26 and 81.95

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Solution

The fourth proportional to 93.49, 129.26 and 81.95 is: 113.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.49 : 129.26 = 81.95 : x
  2. Step 2: Convert to fraction form
    93.49/129.26 = 81.95/x
  3. Step 3: Cross multiply
    93.49x = 129.26 × 81.95
  4. Step 4: Simplify right side
    93.49x = 10,592.86
  5. Step 5: Solve for x
    x = 10,592.86/93.49
  6. Step 6: Final answer
    x = 113.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.