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Finding the Fourth Proportional to 99.16, 148.64 and 38.27

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Solution

The fourth proportional to 99.16, 148.64 and 38.27 is: 57.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.16 : 148.64 = 38.27 : x
  2. Step 2: Convert to fraction form
    99.16/148.64 = 38.27/x
  3. Step 3: Cross multiply
    99.16x = 148.64 × 38.27
  4. Step 4: Simplify right side
    99.16x = 5,688.85
  5. Step 5: Solve for x
    x = 5,688.85/99.16
  6. Step 6: Final answer
    x = 57.37

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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.