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Finding the Fourth Proportional to 93.95, 140.83 and 42.57

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Solution

The fourth proportional to 93.95, 140.83 and 42.57 is: 63.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.95 : 140.83 = 42.57 : x
  2. Step 2: Convert to fraction form
    93.95/140.83 = 42.57/x
  3. Step 3: Cross multiply
    93.95x = 140.83 × 42.57
  4. Step 4: Simplify right side
    93.95x = 5,995.03
  5. Step 5: Solve for x
    x = 5,995.03/93.95
  6. Step 6: Final answer
    x = 63.81

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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.