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Finding the Fourth Proportional to 93.14, 139.54 and 71.47

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Solution

The fourth proportional to 93.14, 139.54 and 71.47 is: 107.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.14 : 139.54 = 71.47 : x
  2. Step 2: Convert to fraction form
    93.14/139.54 = 71.47/x
  3. Step 3: Cross multiply
    93.14x = 139.54 × 71.47
  4. Step 4: Simplify right side
    93.14x = 9,972.92
  5. Step 5: Solve for x
    x = 9,972.92/93.14
  6. Step 6: Final answer
    x = 107.07

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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.