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Finding the Fourth Proportional to 228,761.05, 315,614.58 and 138,082.56

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Solution

The fourth proportional to 228,761.05, 315,614.58 and 138,082.56 is: 190,508.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,761.05 : 315,614.58 = 138,082.56 : x
  2. Step 2: Convert to fraction form
    228,761.05/315,614.58 = 138,082.56/x
  3. Step 3: Cross multiply
    228,761.05x = 315,614.58 × 138,082.56
  4. Step 4: Simplify right side
    228,761.05x = 43,580,869,179.72
  5. Step 5: Solve for x
    x = 43,580,869,179.72/228,761.05
  6. Step 6: Final answer
    x = 190,508.26

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1.5x scale

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.