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Finding the Fourth Proportional to 239,820.62, 330,963.17 and 137,879.15

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Solution

The fourth proportional to 239,820.62, 330,963.17 and 137,879.15 is: 190,279.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,820.62 : 330,963.17 = 137,879.15 : x
  2. Step 2: Convert to fraction form
    239,820.62/330,963.17 = 137,879.15/x
  3. Step 3: Cross multiply
    239,820.62x = 330,963.17 × 137,879.15
  4. Step 4: Simplify right side
    239,820.62x = 45,632,918,216.69
  5. Step 5: Solve for x
    x = 45,632,918,216.69/239,820.62
  6. Step 6: Final answer
    x = 190,279.38

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1.5x scale

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.