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Finding the Fourth Proportional to 51,138.88, 76,735.88 and 21,577.20

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Solution

The fourth proportional to 51,138.88, 76,735.88 and 21,577.20 is: 32,377.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,138.88 : 76,735.88 = 21,577.20 : x
  2. Step 2: Convert to fraction form
    51,138.88/76,735.88 = 21,577.20/x
  3. Step 3: Cross multiply
    51,138.88x = 76,735.88 × 21,577.20
  4. Step 4: Simplify right side
    51,138.88x = 1,655,745,429.94
  5. Step 5: Solve for x
    x = 1,655,745,429.94/51,138.88
  6. Step 6: Final answer
    x = 32,377.43

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1.5x scale

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.