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Finding the Fourth Proportional to 135,357.75, 186,731.64 and 87,626.48

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Solution

The fourth proportional to 135,357.75, 186,731.64 and 87,626.48 is: 120,884.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,357.75 : 186,731.64 = 87,626.48 : x
  2. Step 2: Convert to fraction form
    135,357.75/186,731.64 = 87,626.48/x
  3. Step 3: Cross multiply
    135,357.75x = 186,731.64 × 87,626.48
  4. Step 4: Simplify right side
    135,357.75x = 16,362,635,384.17
  5. Step 5: Solve for x
    x = 16,362,635,384.17/135,357.75
  6. Step 6: Final answer
    x = 120,884.36

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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.