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Finding the Fourth Proportional to 85,605.87, 128,453.55 and 35,042.43

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Solution

The fourth proportional to 85,605.87, 128,453.55 and 35,042.43 is: 52,581.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,605.87 : 128,453.55 = 35,042.43 : x
  2. Step 2: Convert to fraction form
    85,605.87/128,453.55 = 35,042.43/x
  3. Step 3: Cross multiply
    85,605.87x = 128,453.55 × 35,042.43
  4. Step 4: Simplify right side
    85,605.87x = 4,501,324,534.13
  5. Step 5: Solve for x
    x = 4,501,324,534.13/85,605.87
  6. Step 6: Final answer
    x = 52,581.96

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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.