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Finding the Fourth Proportional to 135,317.43, 186,736.89 and 74,886.54

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Solution

The fourth proportional to 135,317.43, 186,736.89 and 74,886.54 is: 103,342.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,317.43 : 186,736.89 = 74,886.54 : x
  2. Step 2: Convert to fraction form
    135,317.43/186,736.89 = 74,886.54/x
  3. Step 3: Cross multiply
    135,317.43x = 186,736.89 × 74,886.54
  4. Step 4: Simplify right side
    135,317.43x = 13,984,079,163.02
  5. Step 5: Solve for x
    x = 13,984,079,163.02/135,317.43
  6. Step 6: Final answer
    x = 103,342.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.