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Finding the Fourth Proportional to 88,198.90, 121,715.34 and 47,912.98

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Solution

The fourth proportional to 88,198.90, 121,715.34 and 47,912.98 is: 66,120.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,198.90 : 121,715.34 = 47,912.98 : x
  2. Step 2: Convert to fraction form
    88,198.90/121,715.34 = 47,912.98/x
  3. Step 3: Cross multiply
    88,198.90x = 121,715.34 × 47,912.98
  4. Step 4: Simplify right side
    88,198.90x = 5,831,744,651.11
  5. Step 5: Solve for x
    x = 5,831,744,651.11/88,198.90
  6. Step 6: Final answer
    x = 66,120.38

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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.