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Finding the Fourth Proportional to 85,658.70, 128,414.21 and 41,316.62

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Solution

The fourth proportional to 85,658.70, 128,414.21 and 41,316.62 is: 61,939.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,658.70 : 128,414.21 = 41,316.62 : x
  2. Step 2: Convert to fraction form
    85,658.70/128,414.21 = 41,316.62/x
  3. Step 3: Cross multiply
    85,658.70x = 128,414.21 × 41,316.62
  4. Step 4: Simplify right side
    85,658.70x = 5,305,640,500.92
  5. Step 5: Solve for x
    x = 5,305,640,500.92/85,658.70
  6. Step 6: Final answer
    x = 61,939.31

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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.