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Finding the Fourth Proportional to 97.50, 146.19 and 51.81

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Solution

The fourth proportional to 97.50, 146.19 and 51.81 is: 77.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.50 : 146.19 = 51.81 : x
  2. Step 2: Convert to fraction form
    97.50/146.19 = 51.81/x
  3. Step 3: Cross multiply
    97.50x = 146.19 × 51.81
  4. Step 4: Simplify right side
    97.50x = 7,574.10
  5. Step 5: Solve for x
    x = 7,574.10/97.50
  6. Step 6: Final answer
    x = 77.68

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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.