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Finding the Fourth Proportional to 51,361.52, 77,026.96 and 21,778.88

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Solution

The fourth proportional to 51,361.52, 77,026.96 and 21,778.88 is: 32,661.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,361.52 : 77,026.96 = 21,778.88 : x
  2. Step 2: Convert to fraction form
    51,361.52/77,026.96 = 21,778.88/x
  3. Step 3: Cross multiply
    51,361.52x = 77,026.96 × 21,778.88
  4. Step 4: Simplify right side
    51,361.52x = 1,677,560,918.60
  5. Step 5: Solve for x
    x = 1,677,560,918.60/51,361.52
  6. Step 6: Final answer
    x = 32,661.82

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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.