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Finding the Fourth Proportional to 85,240.70, 127,939.83 and 43,150.32

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Solution

The fourth proportional to 85,240.70, 127,939.83 and 43,150.32 is: 64,765.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,240.70 : 127,939.83 = 43,150.32 : x
  2. Step 2: Convert to fraction form
    85,240.70/127,939.83 = 43,150.32/x
  3. Step 3: Cross multiply
    85,240.70x = 127,939.83 × 43,150.32
  4. Step 4: Simplify right side
    85,240.70x = 5,520,644,605.25
  5. Step 5: Solve for x
    x = 5,520,644,605.25/85,240.70
  6. Step 6: Final answer
    x = 64,765.36

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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.