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Finding the Fourth Proportional to 93.65, 140.28 and 76.36

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Solution

The fourth proportional to 93.65, 140.28 and 76.36 is: 114.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.65 : 140.28 = 76.36 : x
  2. Step 2: Convert to fraction form
    93.65/140.28 = 76.36/x
  3. Step 3: Cross multiply
    93.65x = 140.28 × 76.36
  4. Step 4: Simplify right side
    93.65x = 10,712.05
  5. Step 5: Solve for x
    x = 10,712.05/93.65
  6. Step 6: Final answer
    x = 114.38

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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.