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Finding the Fourth Proportional to 163.90, 245.84 and 42.16

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Solution

The fourth proportional to 163.90, 245.84 and 42.16 is: 63.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.90 : 245.84 = 42.16 : x
  2. Step 2: Convert to fraction form
    163.90/245.84 = 42.16/x
  3. Step 3: Cross multiply
    163.90x = 245.84 × 42.16
  4. Step 4: Simplify right side
    163.90x = 10,364.61
  5. Step 5: Solve for x
    x = 10,364.61/163.90
  6. Step 6: Final answer
    x = 63.24

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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.