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Finding the Fourth Proportional to 135,168.44, 186,558 and 81,461.12

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Solution

The fourth proportional to 135,168.44, 186,558 and 81,461.12 is: 112,431.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,168.44 : 186,558 = 81,461.12 : x
  2. Step 2: Convert to fraction form
    135,168.44/186,558 = 81,461.12/x
  3. Step 3: Cross multiply
    135,168.44x = 186,558 × 81,461.12
  4. Step 4: Simplify right side
    135,168.44x = 15,197,223,624.96
  5. Step 5: Solve for x
    x = 15,197,223,624.96/135,168.44
  6. Step 6: Final answer
    x = 112,431.75

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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.