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Finding the Fourth Proportional to 163.72, 245.10 and 99.16

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Solution

The fourth proportional to 163.72, 245.10 and 99.16 is: 148.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.72 : 245.10 = 99.16 : x
  2. Step 2: Convert to fraction form
    163.72/245.10 = 99.16/x
  3. Step 3: Cross multiply
    163.72x = 245.10 × 99.16
  4. Step 4: Simplify right side
    163.72x = 24,304.12
  5. Step 5: Solve for x
    x = 24,304.12/163.72
  6. Step 6: Final answer
    x = 148.45

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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.