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Finding the Fourth Proportional to 92,921.87, 128,221.29 and 54,673.02

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Solution

The fourth proportional to 92,921.87, 128,221.29 and 54,673.02 is: 75,442.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,921.87 : 128,221.29 = 54,673.02 : x
  2. Step 2: Convert to fraction form
    92,921.87/128,221.29 = 54,673.02/x
  3. Step 3: Cross multiply
    92,921.87x = 128,221.29 × 54,673.02
  4. Step 4: Simplify right side
    92,921.87x = 7,010,245,152.60
  5. Step 5: Solve for x
    x = 7,010,245,152.60/92,921.87
  6. Step 6: Final answer
    x = 75,442.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.