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Finding the Fourth Proportional to 92,912.86, 128,217.90 and 50,471.70

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Solution

The fourth proportional to 92,912.86, 128,217.90 and 50,471.70 is: 69,649.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,912.86 : 128,217.90 = 50,471.70 : x
  2. Step 2: Convert to fraction form
    92,912.86/128,217.90 = 50,471.70/x
  3. Step 3: Cross multiply
    92,912.86x = 128,217.90 × 50,471.70
  4. Step 4: Simplify right side
    92,912.86x = 6,471,375,383.43
  5. Step 5: Solve for x
    x = 6,471,375,383.43/92,912.86
  6. Step 6: Final answer
    x = 69,649.94

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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.