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Finding the Fourth Proportional to 93.52, 139.61 and 81.37

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Solution

The fourth proportional to 93.52, 139.61 and 81.37 is: 121.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.52 : 139.61 = 81.37 : x
  2. Step 2: Convert to fraction form
    93.52/139.61 = 81.37/x
  3. Step 3: Cross multiply
    93.52x = 139.61 × 81.37
  4. Step 4: Simplify right side
    93.52x = 11,360.07
  5. Step 5: Solve for x
    x = 11,360.07/93.52
  6. Step 6: Final answer
    x = 121.47

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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.