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Finding the Fourth Proportional to 52.52, 78.68 and 45.68

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Solution

The fourth proportional to 52.52, 78.68 and 45.68 is: 68.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.52 : 78.68 = 45.68 : x
  2. Step 2: Convert to fraction form
    52.52/78.68 = 45.68/x
  3. Step 3: Cross multiply
    52.52x = 78.68 × 45.68
  4. Step 4: Simplify right side
    52.52x = 3,594.10
  5. Step 5: Solve for x
    x = 3,594.10/52.52
  6. Step 6: Final answer
    x = 68.43

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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.