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Finding the Fourth Proportional to 53.70, 80.00 and 52.11

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Solution

The fourth proportional to 53.70, 80.00 and 52.11 is: 77.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.70 : 80.00 = 52.11 : x
  2. Step 2: Convert to fraction form
    53.70/80.00 = 52.11/x
  3. Step 3: Cross multiply
    53.70x = 80.00 × 52.11
  4. Step 4: Simplify right side
    53.70x = 4,168.54
  5. Step 5: Solve for x
    x = 4,168.54/53.70
  6. Step 6: Final answer
    x = 77.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.