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Finding the Fourth Proportional to 135,444, 186,850.68 and 87,712.72

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Solution

The fourth proportional to 135,444, 186,850.68 and 87,712.72 is: 121,003.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,444 : 186,850.68 = 87,712.72 : x
  2. Step 2: Convert to fraction form
    135,444/186,850.68 = 87,712.72/x
  3. Step 3: Cross multiply
    135,444x = 186,850.68 × 87,712.72
  4. Step 4: Simplify right side
    135,444x = 16,389,181,376.65
  5. Step 5: Solve for x
    x = 16,389,181,376.65/135,444
  6. Step 6: Final answer
    x = 121,003.38

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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.