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Finding the Fourth Proportional to 187,663.78, 280,789.40 and 131,613.30

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Solution

The fourth proportional to 187,663.78, 280,789.40 and 131,613.30 is: 196,924.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,663.78 : 280,789.40 = 131,613.30 : x
  2. Step 2: Convert to fraction form
    187,663.78/280,789.40 = 131,613.30/x
  3. Step 3: Cross multiply
    187,663.78x = 280,789.40 × 131,613.30
  4. Step 4: Simplify right side
    187,663.78x = 36,955,619,539.02
  5. Step 5: Solve for x
    x = 36,955,619,539.02/187,663.78
  6. Step 6: Final answer
    x = 196,924.63

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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.