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Finding the Fourth Proportional to 127,893.40, 191,840.10 and 39,147.10

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Solution

The fourth proportional to 127,893.40, 191,840.10 and 39,147.10 is: 58,720.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,893.40 : 191,840.10 = 39,147.10 : x
  2. Step 2: Convert to fraction form
    127,893.40/191,840.10 = 39,147.10/x
  3. Step 3: Cross multiply
    127,893.40x = 191,840.10 × 39,147.10
  4. Step 4: Simplify right side
    127,893.40x = 7,509,983,578.71
  5. Step 5: Solve for x
    x = 7,509,983,578.71/127,893.40
  6. Step 6: Final answer
    x = 58,720.65

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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.