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Finding the Fourth Proportional to 85,969.70, 128,845.20 and 41,500.70

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Solution

The fourth proportional to 85,969.70, 128,845.20 and 41,500.70 is: 62,198.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,969.70 : 128,845.20 = 41,500.70 : x
  2. Step 2: Convert to fraction form
    85,969.70/128,845.20 = 41,500.70/x
  3. Step 3: Cross multiply
    85,969.70x = 128,845.20 × 41,500.70
  4. Step 4: Simplify right side
    85,969.70x = 5,347,165,991.64
  5. Step 5: Solve for x
    x = 5,347,165,991.64/85,969.70
  6. Step 6: Final answer
    x = 62,198.26

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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.