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Finding the Fourth Proportional to 93.43, 139.46 and 74.94

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Solution

The fourth proportional to 93.43, 139.46 and 74.94 is: 111.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.43 : 139.46 = 74.94 : x
  2. Step 2: Convert to fraction form
    93.43/139.46 = 74.94/x
  3. Step 3: Cross multiply
    93.43x = 139.46 × 74.94
  4. Step 4: Simplify right side
    93.43x = 10,451.13
  5. Step 5: Solve for x
    x = 10,451.13/93.43
  6. Step 6: Final answer
    x = 111.86

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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.