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Finding the Fourth Proportional to 93.11, 139.34 and 80.43

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Solution

The fourth proportional to 93.11, 139.34 and 80.43 is: 120.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.11 : 139.34 = 80.43 : x
  2. Step 2: Convert to fraction form
    93.11/139.34 = 80.43/x
  3. Step 3: Cross multiply
    93.11x = 139.34 × 80.43
  4. Step 4: Simplify right side
    93.11x = 11,206.71
  5. Step 5: Solve for x
    x = 11,206.71/93.11
  6. Step 6: Final answer
    x = 120.36

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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.