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Finding the Fourth Proportional to 247,149.78, 341,078.08 and 139,724.34

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Solution

The fourth proportional to 247,149.78, 341,078.08 and 139,724.34 is: 192,826.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,149.78 : 341,078.08 = 139,724.34 : x
  2. Step 2: Convert to fraction form
    247,149.78/341,078.08 = 139,724.34/x
  3. Step 3: Cross multiply
    247,149.78x = 341,078.08 × 139,724.34
  4. Step 4: Simplify right side
    247,149.78x = 47,656,909,616.47
  5. Step 5: Solve for x
    x = 47,656,909,616.47/247,149.78
  6. Step 6: Final answer
    x = 192,826.02

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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.