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Finding the Fourth Proportional to 51.77, 77.58 and 45.33

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Solution

The fourth proportional to 51.77, 77.58 and 45.33 is: 67.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.77 : 77.58 = 45.33 : x
  2. Step 2: Convert to fraction form
    51.77/77.58 = 45.33/x
  3. Step 3: Cross multiply
    51.77x = 77.58 × 45.33
  4. Step 4: Simplify right side
    51.77x = 3,516.70
  5. Step 5: Solve for x
    x = 3,516.70/51.77
  6. Step 6: Final answer
    x = 67.93

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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.