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Finding the Fourth Proportional to 52.05, 77.85 and 39.07

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Solution

The fourth proportional to 52.05, 77.85 and 39.07 is: 58.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.05 : 77.85 = 39.07 : x
  2. Step 2: Convert to fraction form
    52.05/77.85 = 39.07/x
  3. Step 3: Cross multiply
    52.05x = 77.85 × 39.07
  4. Step 4: Simplify right side
    52.05x = 3,041.70
  5. Step 5: Solve for x
    x = 3,041.70/52.05
  6. Step 6: Final answer
    x = 58.43

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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.