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Finding the Fourth Proportional to 93.02, 138.86 and 84.38

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Solution

The fourth proportional to 93.02, 138.86 and 84.38 is: 125.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.02 : 138.86 = 84.38 : x
  2. Step 2: Convert to fraction form
    93.02/138.86 = 84.38/x
  3. Step 3: Cross multiply
    93.02x = 138.86 × 84.38
  4. Step 4: Simplify right side
    93.02x = 11,717.01
  5. Step 5: Solve for x
    x = 11,717.01/93.02
  6. Step 6: Final answer
    x = 125.96

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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.