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Finding the Fourth Proportional to 93.25, 139.15 and 80.29

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Solution

The fourth proportional to 93.25, 139.15 and 80.29 is: 119.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.25 : 139.15 = 80.29 : x
  2. Step 2: Convert to fraction form
    93.25/139.15 = 80.29/x
  3. Step 3: Cross multiply
    93.25x = 139.15 × 80.29
  4. Step 4: Simplify right side
    93.25x = 11,172.35
  5. Step 5: Solve for x
    x = 11,172.35/93.25
  6. Step 6: Final answer
    x = 119.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.