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Finding the Fourth Proportional to 127,846.60, 191,769.90 and 71,859.40

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Solution

The fourth proportional to 127,846.60, 191,769.90 and 71,859.40 is: 107,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,846.60 : 191,769.90 = 71,859.40 : x
  2. Step 2: Convert to fraction form
    127,846.60/191,769.90 = 71,859.40/x
  3. Step 3: Cross multiply
    127,846.60x = 191,769.90 × 71,859.40
  4. Step 4: Simplify right side
    127,846.60x = 13,780,469,952.06
  5. Step 5: Solve for x
    x = 13,780,469,952.06/127,846.60
  6. Step 6: Final answer
    x = 107,789.10

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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.