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Finding the Fourth Proportional to 163.70, 245.55 and 54.02

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Solution

The fourth proportional to 163.70, 245.55 and 54.02 is: 81.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.70 : 245.55 = 54.02 : x
  2. Step 2: Convert to fraction form
    163.70/245.55 = 54.02/x
  3. Step 3: Cross multiply
    163.70x = 245.55 × 54.02
  4. Step 4: Simplify right side
    163.70x = 13,264.61
  5. Step 5: Solve for x
    x = 13,264.61/163.70
  6. Step 6: Final answer
    x = 81.03

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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.