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Finding the Fourth Proportional to 135,318.78, 186,740.91 and 81,593.10

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Solution

The fourth proportional to 135,318.78, 186,740.91 and 81,593.10 is: 112,599.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,318.78 : 186,740.91 = 81,593.10 : x
  2. Step 2: Convert to fraction form
    135,318.78/186,740.91 = 81,593.10/x
  3. Step 3: Cross multiply
    135,318.78x = 186,740.91 × 81,593.10
  4. Step 4: Simplify right side
    135,318.78x = 15,236,769,743.72
  5. Step 5: Solve for x
    x = 15,236,769,743.72/135,318.78
  6. Step 6: Final answer
    x = 112,599.08

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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.