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Finding the Fourth Proportional to 207,398.15, 311,217.96 and 87,447.58

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Solution

The fourth proportional to 207,398.15, 311,217.96 and 87,447.58 is: 131,222.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,398.15 : 311,217.96 = 87,447.58 : x
  2. Step 2: Convert to fraction form
    207,398.15/311,217.96 = 87,447.58/x
  3. Step 3: Cross multiply
    207,398.15x = 311,217.96 × 87,447.58
  4. Step 4: Simplify right side
    207,398.15x = 27,215,257,004.42
  5. Step 5: Solve for x
    x = 27,215,257,004.42/207,398.15
  6. Step 6: Final answer
    x = 131,222.28

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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.