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Finding the Fourth Proportional to 52.05, 71.78 and 35.68

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Solution

The fourth proportional to 52.05, 71.78 and 35.68 is: 49.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.05 : 71.78 = 35.68 : x
  2. Step 2: Convert to fraction form
    52.05/71.78 = 35.68/x
  3. Step 3: Cross multiply
    52.05x = 71.78 × 35.68
  4. Step 4: Simplify right side
    52.05x = 2,561.02
  5. Step 5: Solve for x
    x = 2,561.02/52.05
  6. Step 6: Final answer
    x = 49.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.