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Finding the Fourth Proportional to 51.63, 77.23 and 45.85

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Solution

The fourth proportional to 51.63, 77.23 and 45.85 is: 68.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.63 : 77.23 = 45.85 : x
  2. Step 2: Convert to fraction form
    51.63/77.23 = 45.85/x
  3. Step 3: Cross multiply
    51.63x = 77.23 × 45.85
  4. Step 4: Simplify right side
    51.63x = 3,541.00
  5. Step 5: Solve for x
    x = 3,541.00/51.63
  6. Step 6: Final answer
    x = 68.58

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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.