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Finding the Fourth Proportional to 127,507.74, 191,086.65 and 80,676.78

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Solution

The fourth proportional to 127,507.74, 191,086.65 and 80,676.78 is: 120,904.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,507.74 : 191,086.65 = 80,676.78 : x
  2. Step 2: Convert to fraction form
    127,507.74/191,086.65 = 80,676.78/x
  3. Step 3: Cross multiply
    127,507.74x = 191,086.65 × 80,676.78
  4. Step 4: Simplify right side
    127,507.74x = 15,416,255,622.99
  5. Step 5: Solve for x
    x = 15,416,255,622.99/127,507.74
  6. Step 6: Final answer
    x = 120,904.47

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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.