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Finding the Fourth Proportional to 99,198.48, 136,906.44 and 61,478.40

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Solution

The fourth proportional to 99,198.48, 136,906.44 and 61,478.40 is: 84,847.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,198.48 : 136,906.44 = 61,478.40 : x
  2. Step 2: Convert to fraction form
    99,198.48/136,906.44 = 61,478.40/x
  3. Step 3: Cross multiply
    99,198.48x = 136,906.44 × 61,478.40
  4. Step 4: Simplify right side
    99,198.48x = 8,416,788,880.90
  5. Step 5: Solve for x
    x = 8,416,788,880.90/99,198.48
  6. Step 6: Final answer
    x = 84,847.96

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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.