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Finding the Fourth Proportional to 85,855.70, 128,751.15 and 35,939.27

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Solution

The fourth proportional to 85,855.70, 128,751.15 and 35,939.27 is: 53,895.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,855.70 : 128,751.15 = 35,939.27 : x
  2. Step 2: Convert to fraction form
    85,855.70/128,751.15 = 35,939.27/x
  3. Step 3: Cross multiply
    85,855.70x = 128,751.15 × 35,939.27
  4. Step 4: Simplify right side
    85,855.70x = 4,627,222,342.66
  5. Step 5: Solve for x
    x = 4,627,222,342.66/85,855.70
  6. Step 6: Final answer
    x = 53,895.34

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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.