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Finding the Fourth Proportional to 92,639.22, 138,978.38 and 35,714.58

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Solution

The fourth proportional to 92,639.22, 138,978.38 and 35,714.58 is: 53,579.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,639.22 : 138,978.38 = 35,714.58 : x
  2. Step 2: Convert to fraction form
    92,639.22/138,978.38 = 35,714.58/x
  3. Step 3: Cross multiply
    92,639.22x = 138,978.38 × 35,714.58
  4. Step 4: Simplify right side
    92,639.22x = 4,963,554,470.78
  5. Step 5: Solve for x
    x = 4,963,554,470.78/92,639.22
  6. Step 6: Final answer
    x = 53,579.41

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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.