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Finding the Fourth Proportional to 51.63, 77.10 and 49.98

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Solution

The fourth proportional to 51.63, 77.10 and 49.98 is: 74.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.63 : 77.10 = 49.98 : x
  2. Step 2: Convert to fraction form
    51.63/77.10 = 49.98/x
  3. Step 3: Cross multiply
    51.63x = 77.10 × 49.98
  4. Step 4: Simplify right side
    51.63x = 3,853.46
  5. Step 5: Solve for x
    x = 3,853.46/51.63
  6. Step 6: Final answer
    x = 74.64

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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.