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Finding the Fourth Proportional to 239,168.78, 330,040.74 and 131,736.50

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Solution

The fourth proportional to 239,168.78, 330,040.74 and 131,736.50 is: 181,789.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,168.78 : 330,040.74 = 131,736.50 : x
  2. Step 2: Convert to fraction form
    239,168.78/330,040.74 = 131,736.50/x
  3. Step 3: Cross multiply
    239,168.78x = 330,040.74 × 131,736.50
  4. Step 4: Simplify right side
    239,168.78x = 43,478,411,945.01
  5. Step 5: Solve for x
    x = 43,478,411,945.01/239,168.78
  6. Step 6: Final answer
    x = 181,789.66

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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.