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Finding the Fourth Proportional to 127,904.40, 191,856.60 and 81,363.60

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Solution

The fourth proportional to 127,904.40, 191,856.60 and 81,363.60 is: 122,045.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,904.40 : 191,856.60 = 81,363.60 : x
  2. Step 2: Convert to fraction form
    127,904.40/191,856.60 = 81,363.60/x
  3. Step 3: Cross multiply
    127,904.40x = 191,856.60 × 81,363.60
  4. Step 4: Simplify right side
    127,904.40x = 15,610,143,659.76
  5. Step 5: Solve for x
    x = 15,610,143,659.76/127,904.40
  6. Step 6: Final answer
    x = 122,045.40

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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.