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Finding the Fourth Proportional to 239,743, 359,631.78 and 91,999

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Solution

The fourth proportional to 239,743, 359,631.78 and 91,999 is: 138,005.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,743 : 359,631.78 = 91,999 : x
  2. Step 2: Convert to fraction form
    239,743/359,631.78 = 91,999/x
  3. Step 3: Cross multiply
    239,743x = 359,631.78 × 91,999
  4. Step 4: Simplify right side
    239,743x = 33,085,764,128.22
  5. Step 5: Solve for x
    x = 33,085,764,128.22/239,743
  6. Step 6: Final answer
    x = 138,005.13

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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.