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Finding the Fourth Proportional to 101,911.55, 140,640.56 and 56,591.43

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Solution

The fourth proportional to 101,911.55, 140,640.56 and 56,591.43 is: 78,097.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,911.55 : 140,640.56 = 56,591.43 : x
  2. Step 2: Convert to fraction form
    101,911.55/140,640.56 = 56,591.43/x
  3. Step 3: Cross multiply
    101,911.55x = 140,640.56 × 56,591.43
  4. Step 4: Simplify right side
    101,911.55x = 7,959,050,123.44
  5. Step 5: Solve for x
    x = 7,959,050,123.44/101,911.55
  6. Step 6: Final answer
    x = 78,097.63

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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.