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Finding the Fourth Proportional to 207,364.55, 311,167.80 and 87,414.21

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Solution

The fourth proportional to 207,364.55, 311,167.80 and 87,414.21 is: 131,172.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,364.55 : 311,167.80 = 87,414.21 : x
  2. Step 2: Convert to fraction form
    207,364.55/311,167.80 = 87,414.21/x
  3. Step 3: Cross multiply
    207,364.55x = 311,167.80 × 87,414.21
  4. Step 4: Simplify right side
    207,364.55x = 27,200,487,414.44
  5. Step 5: Solve for x
    x = 27,200,487,414.44/207,364.55
  6. Step 6: Final answer
    x = 131,172.31

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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.