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Finding the Fourth Proportional to 131,234.76, 196,856.46 and 42,489

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Solution

The fourth proportional to 131,234.76, 196,856.46 and 42,489 is: 63,734.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,234.76 : 196,856.46 = 42,489 : x
  2. Step 2: Convert to fraction form
    131,234.76/196,856.46 = 42,489/x
  3. Step 3: Cross multiply
    131,234.76x = 196,856.46 × 42,489
  4. Step 4: Simplify right side
    131,234.76x = 8,364,234,128.94
  5. Step 5: Solve for x
    x = 8,364,234,128.94/131,234.76
  6. Step 6: Final answer
    x = 63,734.90

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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.