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Finding the Fourth Proportional to 239,749, 359,640.78 and 92,005

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Solution

The fourth proportional to 239,749, 359,640.78 and 92,005 is: 138,014.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,749 : 359,640.78 = 92,005 : x
  2. Step 2: Convert to fraction form
    239,749/359,640.78 = 92,005/x
  3. Step 3: Cross multiply
    239,749x = 359,640.78 × 92,005
  4. Step 4: Simplify right side
    239,749x = 33,088,749,963.90
  5. Step 5: Solve for x
    x = 33,088,749,963.90/239,749
  6. Step 6: Final answer
    x = 138,014.13

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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.