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Finding the Fourth Proportional to 127,951.20, 191,926.80 and 78,184.80

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Solution

The fourth proportional to 127,951.20, 191,926.80 and 78,184.80 is: 117,277.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,951.20 : 191,926.80 = 78,184.80 : x
  2. Step 2: Convert to fraction form
    127,951.20/191,926.80 = 78,184.80/x
  3. Step 3: Cross multiply
    127,951.20x = 191,926.80 × 78,184.80
  4. Step 4: Simplify right side
    127,951.20x = 15,005,758,472.64
  5. Step 5: Solve for x
    x = 15,005,758,472.64/127,951.20
  6. Step 6: Final answer
    x = 117,277.20

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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.