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Finding the Fourth Proportional to 51,361.70, 77,042.54 and 13,921.77

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Solution

The fourth proportional to 51,361.70, 77,042.54 and 13,921.77 is: 20,882.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,361.70 : 77,042.54 = 13,921.77 : x
  2. Step 2: Convert to fraction form
    51,361.70/77,042.54 = 13,921.77/x
  3. Step 3: Cross multiply
    51,361.70x = 77,042.54 × 13,921.77
  4. Step 4: Simplify right side
    51,361.70x = 1,072,568,845.81
  5. Step 5: Solve for x
    x = 1,072,568,845.81/51,361.70
  6. Step 6: Final answer
    x = 20,882.66

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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.