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Finding the Fourth Proportional to 238,663.56, 357,976.48 and 138,760

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Solution

The fourth proportional to 238,663.56, 357,976.48 and 138,760 is: 208,129.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,663.56 : 357,976.48 = 138,760 : x
  2. Step 2: Convert to fraction form
    238,663.56/357,976.48 = 138,760/x
  3. Step 3: Cross multiply
    238,663.56x = 357,976.48 × 138,760
  4. Step 4: Simplify right side
    238,663.56x = 49,672,816,364.80
  5. Step 5: Solve for x
    x = 49,672,816,364.80/238,663.56
  6. Step 6: Final answer
    x = 208,129.03

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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.