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Finding the Fourth Proportional to 127,919.20, 191,533.20 and 100,271.20

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Solution

The fourth proportional to 127,919.20, 191,533.20 and 100,271.20 is: 150,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,919.20 : 191,533.20 = 100,271.20 : x
  2. Step 2: Convert to fraction form
    127,919.20/191,533.20 = 100,271.20/x
  3. Step 3: Cross multiply
    127,919.20x = 191,533.20 × 100,271.20
  4. Step 4: Simplify right side
    127,919.20x = 19,205,263,803.84
  5. Step 5: Solve for x
    x = 19,205,263,803.84/127,919.20
  6. Step 6: Final answer
    x = 150,135.90

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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.