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Finding the Fourth Proportional to 61,980.64, 92,919.14 and 28,724.54

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Solution

The fourth proportional to 61,980.64, 92,919.14 and 28,724.54 is: 43,062.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,980.64 : 92,919.14 = 28,724.54 : x
  2. Step 2: Convert to fraction form
    61,980.64/92,919.14 = 28,724.54/x
  3. Step 3: Cross multiply
    61,980.64x = 92,919.14 × 28,724.54
  4. Step 4: Simplify right side
    61,980.64x = 2,669,059,553.70
  5. Step 5: Solve for x
    x = 2,669,059,553.70/61,980.64
  6. Step 6: Final answer
    x = 43,062.79

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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.