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Finding the Fourth Proportional to 74.96, 103.48 and 47.37

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Solution

The fourth proportional to 74.96, 103.48 and 47.37 is: 65.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.96 : 103.48 = 47.37 : x
  2. Step 2: Convert to fraction form
    74.96/103.48 = 47.37/x
  3. Step 3: Cross multiply
    74.96x = 103.48 × 47.37
  4. Step 4: Simplify right side
    74.96x = 4,902.12
  5. Step 5: Solve for x
    x = 4,902.12/74.96
  6. Step 6: Final answer
    x = 65.40

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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.