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Finding the Fourth Proportional to 85,892.67, 128,851.29 and 26,734.32

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Solution

The fourth proportional to 85,892.67, 128,851.29 and 26,734.32 is: 40,105.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,892.67 : 128,851.29 = 26,734.32 : x
  2. Step 2: Convert to fraction form
    85,892.67/128,851.29 = 26,734.32/x
  3. Step 3: Cross multiply
    85,892.67x = 128,851.29 × 26,734.32
  4. Step 4: Simplify right side
    85,892.67x = 3,444,751,619.27
  5. Step 5: Solve for x
    x = 3,444,751,619.27/85,892.67
  6. Step 6: Final answer
    x = 40,105.30

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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.