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Finding the Fourth Proportional to 239,212.95, 358,481.13 and 132,643.86

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Solution

The fourth proportional to 239,212.95, 358,481.13 and 132,643.86 is: 198,778.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,212.95 : 358,481.13 = 132,643.86 : x
  2. Step 2: Convert to fraction form
    239,212.95/358,481.13 = 132,643.86/x
  3. Step 3: Cross multiply
    239,212.95x = 358,481.13 × 132,643.86
  4. Step 4: Simplify right side
    239,212.95x = 47,550,320,820.36
  5. Step 5: Solve for x
    x = 47,550,320,820.36/239,212.95
  6. Step 6: Final answer
    x = 198,778.21

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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.