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Finding the Fourth Proportional to 51.51, 70.72 and 50.19

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Solution

The fourth proportional to 51.51, 70.72 and 50.19 is: 68.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.51 : 70.72 = 50.19 : x
  2. Step 2: Convert to fraction form
    51.51/70.72 = 50.19/x
  3. Step 3: Cross multiply
    51.51x = 70.72 × 50.19
  4. Step 4: Simplify right side
    51.51x = 3,549.44
  5. Step 5: Solve for x
    x = 3,549.44/51.51
  6. Step 6: Final answer
    x = 68.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.