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Finding the Fourth Proportional to 93.80, 140.46 and 68.28

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Solution

The fourth proportional to 93.80, 140.46 and 68.28 is: 102.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.80 : 140.46 = 68.28 : x
  2. Step 2: Convert to fraction form
    93.80/140.46 = 68.28/x
  3. Step 3: Cross multiply
    93.80x = 140.46 × 68.28
  4. Step 4: Simplify right side
    93.80x = 9,590.61
  5. Step 5: Solve for x
    x = 9,590.61/93.80
  6. Step 6: Final answer
    x = 102.25

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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.