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Finding the Fourth Proportional to 93.88, 140.62 and 61.76

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Solution

The fourth proportional to 93.88, 140.62 and 61.76 is: 92.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.88 : 140.62 = 61.76 : x
  2. Step 2: Convert to fraction form
    93.88/140.62 = 61.76/x
  3. Step 3: Cross multiply
    93.88x = 140.62 × 61.76
  4. Step 4: Simplify right side
    93.88x = 8,684.69
  5. Step 5: Solve for x
    x = 8,684.69/93.88
  6. Step 6: Final answer
    x = 92.51

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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.