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Finding the Fourth Proportional to 163.48, 245.16 and 47.90

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Solution

The fourth proportional to 163.48, 245.16 and 47.90 is: 71.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.48 : 245.16 = 47.90 : x
  2. Step 2: Convert to fraction form
    163.48/245.16 = 47.90/x
  3. Step 3: Cross multiply
    163.48x = 245.16 × 47.90
  4. Step 4: Simplify right side
    163.48x = 11,742.06
  5. Step 5: Solve for x
    x = 11,742.06/163.48
  6. Step 6: Final answer
    x = 71.83

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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.