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Finding the Fourth Proportional to 127,394.40, 191,091.60 and 38,643.60

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Solution

The fourth proportional to 127,394.40, 191,091.60 and 38,643.60 is: 57,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,394.40 : 191,091.60 = 38,643.60 : x
  2. Step 2: Convert to fraction form
    127,394.40/191,091.60 = 38,643.60/x
  3. Step 3: Cross multiply
    127,394.40x = 191,091.60 × 38,643.60
  4. Step 4: Simplify right side
    127,394.40x = 7,384,467,353.76
  5. Step 5: Solve for x
    x = 7,384,467,353.76/127,394.40
  6. Step 6: Final answer
    x = 57,965.40

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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.