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Finding the Fourth Proportional to 93.17, 140.25 and 71.63

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Solution

The fourth proportional to 93.17, 140.25 and 71.63 is: 107.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.17 : 140.25 = 71.63 : x
  2. Step 2: Convert to fraction form
    93.17/140.25 = 71.63/x
  3. Step 3: Cross multiply
    93.17x = 140.25 × 71.63
  4. Step 4: Simplify right side
    93.17x = 10,045.41
  5. Step 5: Solve for x
    x = 10,045.41/93.17
  6. Step 6: Final answer
    x = 107.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.