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Finding the Fourth Proportional to 127,893.64, 191,840.64 and 39,147.52

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Solution

The fourth proportional to 127,893.64, 191,840.64 and 39,147.52 is: 58,721.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,893.64 : 191,840.64 = 39,147.52 : x
  2. Step 2: Convert to fraction form
    127,893.64/191,840.64 = 39,147.52/x
  3. Step 3: Cross multiply
    127,893.64x = 191,840.64 × 39,147.52
  4. Step 4: Simplify right side
    127,893.64x = 7,510,085,291.21
  5. Step 5: Solve for x
    x = 7,510,085,291.21/127,893.64
  6. Step 6: Final answer
    x = 58,721.34

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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.