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Finding the Fourth Proportional to 187,659.78, 280,783.40 and 131,609.30

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Solution

The fourth proportional to 187,659.78, 280,783.40 and 131,609.30 is: 196,918.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,659.78 : 280,783.40 = 131,609.30 : x
  2. Step 2: Convert to fraction form
    187,659.78/280,783.40 = 131,609.30/x
  3. Step 3: Cross multiply
    187,659.78x = 280,783.40 × 131,609.30
  4. Step 4: Simplify right side
    187,659.78x = 36,953,706,725.62
  5. Step 5: Solve for x
    x = 36,953,706,725.62/187,659.78
  6. Step 6: Final answer
    x = 196,918.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.