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Finding the Fourth Proportional to 135,310.85, 186,724.37 and 74,884.04

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Solution

The fourth proportional to 135,310.85, 186,724.37 and 74,884.04 is: 103,337.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,310.85 : 186,724.37 = 74,884.04 : x
  2. Step 2: Convert to fraction form
    135,310.85/186,724.37 = 74,884.04/x
  3. Step 3: Cross multiply
    135,310.85x = 186,724.37 × 74,884.04
  4. Step 4: Simplify right side
    135,310.85x = 13,982,674,817.63
  5. Step 5: Solve for x
    x = 13,982,674,817.63/135,310.85
  6. Step 6: Final answer
    x = 103,337.43

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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.