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Finding the Fourth Proportional to 85,755.83, 128,647.37 and 26,579.25

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Solution

The fourth proportional to 85,755.83, 128,647.37 and 26,579.25 is: 39,873.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,755.83 : 128,647.37 = 26,579.25 : x
  2. Step 2: Convert to fraction form
    85,755.83/128,647.37 = 26,579.25/x
  3. Step 3: Cross multiply
    85,755.83x = 128,647.37 × 26,579.25
  4. Step 4: Simplify right side
    85,755.83x = 3,419,350,675.52
  5. Step 5: Solve for x
    x = 3,419,350,675.52/85,755.83
  6. Step 6: Final answer
    x = 39,873.10

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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.