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Finding the Fourth Proportional to 131,238.92, 196,809.78 and 42,469.40

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Solution

The fourth proportional to 131,238.92, 196,809.78 and 42,469.40 is: 63,688.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,238.92 : 196,809.78 = 42,469.40 : x
  2. Step 2: Convert to fraction form
    131,238.92/196,809.78 = 42,469.40/x
  3. Step 3: Cross multiply
    131,238.92x = 196,809.78 × 42,469.40
  4. Step 4: Simplify right side
    131,238.92x = 8,358,393,270.73
  5. Step 5: Solve for x
    x = 8,358,393,270.73/131,238.92
  6. Step 6: Final answer
    x = 63,688.37

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1.5x scale

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.