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Finding the Fourth Proportional to 127,866.40, 191,799.60 and 39,120.10

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Solution

The fourth proportional to 127,866.40, 191,799.60 and 39,120.10 is: 58,680.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,866.40 : 191,799.60 = 39,120.10 : x
  2. Step 2: Convert to fraction form
    127,866.40/191,799.60 = 39,120.10/x
  3. Step 3: Cross multiply
    127,866.40x = 191,799.60 × 39,120.10
  4. Step 4: Simplify right side
    127,866.40x = 7,503,219,531.96
  5. Step 5: Solve for x
    x = 7,503,219,531.96/127,866.40
  6. Step 6: Final answer
    x = 58,680.15

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Similar ratio
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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.