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Finding the Fourth Proportional to 247,138.05, 341,065.17 and 139,718.09

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Solution

The fourth proportional to 247,138.05, 341,065.17 and 139,718.09 is: 192,819.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,138.05 : 341,065.17 = 139,718.09 : x
  2. Step 2: Convert to fraction form
    247,138.05/341,065.17 = 139,718.09/x
  3. Step 3: Cross multiply
    247,138.05x = 341,065.17 × 139,718.09
  4. Step 4: Simplify right side
    247,138.05x = 47,652,972,412.60
  5. Step 5: Solve for x
    x = 47,652,972,412.60/247,138.05
  6. Step 6: Final answer
    x = 192,819.25

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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.