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Finding the Fourth Proportional to 116.32, 174.50 and 85.54

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Solution

The fourth proportional to 116.32, 174.50 and 85.54 is: 128.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.32 : 174.50 = 85.54 : x
  2. Step 2: Convert to fraction form
    116.32/174.50 = 85.54/x
  3. Step 3: Cross multiply
    116.32x = 174.50 × 85.54
  4. Step 4: Simplify right side
    116.32x = 14,926.73
  5. Step 5: Solve for x
    x = 14,926.73/116.32
  6. Step 6: Final answer
    x = 128.32

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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.