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Finding the Fourth Proportional to 92,908.38, 128,216.34 and 50,469.78

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Solution

The fourth proportional to 92,908.38, 128,216.34 and 50,469.78 is: 69,649.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,908.38 : 128,216.34 = 50,469.78 : x
  2. Step 2: Convert to fraction form
    92,908.38/128,216.34 = 50,469.78/x
  3. Step 3: Cross multiply
    92,908.38x = 128,216.34 × 50,469.78
  4. Step 4: Simplify right side
    92,908.38x = 6,471,050,472.21
  5. Step 5: Solve for x
    x = 6,471,050,472.21/92,908.38
  6. Step 6: Final answer
    x = 69,649.80

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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.