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Finding the Fourth Proportional to 247,234.70, 341,190.60 and 139,820.78

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Solution

The fourth proportional to 247,234.70, 341,190.60 and 139,820.78 is: 192,956.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,234.70 : 341,190.60 = 139,820.78 : x
  2. Step 2: Convert to fraction form
    247,234.70/341,190.60 = 139,820.78/x
  3. Step 3: Cross multiply
    247,234.70x = 341,190.60 × 139,820.78
  4. Step 4: Simplify right side
    247,234.70x = 47,705,535,820.67
  5. Step 5: Solve for x
    x = 47,705,535,820.67/247,234.70
  6. Step 6: Final answer
    x = 192,956.47

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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.