Home / 135,173.46-186,537.43-74,742.78

Finding the Fourth Proportional to 135,173.46, 186,537.43 and 74,742.78

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Solution

The fourth proportional to 135,173.46, 186,537.43 and 74,742.78 is: 103,143.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,173.46 : 186,537.43 = 74,742.78 : x
  2. Step 2: Convert to fraction form
    135,173.46/186,537.43 = 74,742.78/x
  3. Step 3: Cross multiply
    135,173.46x = 186,537.43 × 74,742.78
  4. Step 4: Simplify right side
    135,173.46x = 13,942,325,311.29
  5. Step 5: Solve for x
    x = 13,942,325,311.29/135,173.46
  6. Step 6: Final answer
    x = 103,143.96

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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.