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Finding the Fourth Proportional to 93.08, 128.52 and 80.24

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Solution

The fourth proportional to 93.08, 128.52 and 80.24 is: 110.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.08 : 128.52 = 80.24 : x
  2. Step 2: Convert to fraction form
    93.08/128.52 = 80.24/x
  3. Step 3: Cross multiply
    93.08x = 128.52 × 80.24
  4. Step 4: Simplify right side
    93.08x = 10,312.44
  5. Step 5: Solve for x
    x = 10,312.44/93.08
  6. Step 6: Final answer
    x = 110.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.