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Finding the Fourth Proportional to 93.11, 128.41 and 59.92

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Solution

The fourth proportional to 93.11, 128.41 and 59.92 is: 82.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.11 : 128.41 = 59.92 : x
  2. Step 2: Convert to fraction form
    93.11/128.41 = 59.92/x
  3. Step 3: Cross multiply
    93.11x = 128.41 × 59.92
  4. Step 4: Simplify right side
    93.11x = 7,693.93
  5. Step 5: Solve for x
    x = 7,693.93/93.11
  6. Step 6: Final answer
    x = 82.64

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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.