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Finding the Fourth Proportional to 93.62, 139.42 and 93.26

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Solution

The fourth proportional to 93.62, 139.42 and 93.26 is: 138.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.62 : 139.42 = 93.26 : x
  2. Step 2: Convert to fraction form
    93.62/139.42 = 93.26/x
  3. Step 3: Cross multiply
    93.62x = 139.42 × 93.26
  4. Step 4: Simplify right side
    93.62x = 13,002.31
  5. Step 5: Solve for x
    x = 13,002.31/93.62
  6. Step 6: Final answer
    x = 138.88

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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.