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Finding the Fourth Proportional to 52.50, 78.39 and 49.08

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Solution

The fourth proportional to 52.50, 78.39 and 49.08 is: 73.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.50 : 78.39 = 49.08 : x
  2. Step 2: Convert to fraction form
    52.50/78.39 = 49.08/x
  3. Step 3: Cross multiply
    52.50x = 78.39 × 49.08
  4. Step 4: Simplify right side
    52.50x = 3,847.38
  5. Step 5: Solve for x
    x = 3,847.38/52.50
  6. Step 6: Final answer
    x = 73.28

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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.