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Finding the Fourth Proportional to 50,756, 70,043.28 and 28,404.32

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Solution

The fourth proportional to 50,756, 70,043.28 and 28,404.32 is: 39,197.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,756 : 70,043.28 = 28,404.32 : x
  2. Step 2: Convert to fraction form
    50,756/70,043.28 = 28,404.32/x
  3. Step 3: Cross multiply
    50,756x = 70,043.28 × 28,404.32
  4. Step 4: Simplify right side
    50,756x = 1,989,531,738.97
  5. Step 5: Solve for x
    x = 1,989,531,738.97/50,756
  6. Step 6: Final answer
    x = 39,197.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.