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Finding the Fourth Proportional to 85,837.78, 128,756.73 and 26,673.49

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Solution

The fourth proportional to 85,837.78, 128,756.73 and 26,673.49 is: 40,010.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,837.78 : 128,756.73 = 26,673.49 : x
  2. Step 2: Convert to fraction form
    85,837.78/128,756.73 = 26,673.49/x
  3. Step 3: Cross multiply
    85,837.78x = 128,756.73 × 26,673.49
  4. Step 4: Simplify right side
    85,837.78x = 3,434,391,350.09
  5. Step 5: Solve for x
    x = 3,434,391,350.09/85,837.78
  6. Step 6: Final answer
    x = 40,010.25

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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.