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Finding the Fourth Proportional to 93.97, 139.81 and 93.65

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Solution

The fourth proportional to 93.97, 139.81 and 93.65 is: 139.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.97 : 139.81 = 93.65 : x
  2. Step 2: Convert to fraction form
    93.97/139.81 = 93.65/x
  3. Step 3: Cross multiply
    93.97x = 139.81 × 93.65
  4. Step 4: Simplify right side
    93.97x = 13,093.21
  5. Step 5: Solve for x
    x = 13,093.21/93.97
  6. Step 6: Final answer
    x = 139.33

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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.