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Finding the Fourth Proportional to 53.55, 80.63 and 40.11

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Solution

The fourth proportional to 53.55, 80.63 and 40.11 is: 60.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.55 : 80.63 = 40.11 : x
  2. Step 2: Convert to fraction form
    53.55/80.63 = 40.11/x
  3. Step 3: Cross multiply
    53.55x = 80.63 × 40.11
  4. Step 4: Simplify right side
    53.55x = 3,233.87
  5. Step 5: Solve for x
    x = 3,233.87/53.55
  6. Step 6: Final answer
    x = 60.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.