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Finding the Fourth Proportional to 99,608.70, 149,406.57 and 40,449.54

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Solution

The fourth proportional to 99,608.70, 149,406.57 and 40,449.54 is: 60,671.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,608.70 : 149,406.57 = 40,449.54 : x
  2. Step 2: Convert to fraction form
    99,608.70/149,406.57 = 40,449.54/x
  3. Step 3: Cross multiply
    99,608.70x = 149,406.57 × 40,449.54
  4. Step 4: Simplify right side
    99,608.70x = 6,043,427,029.48
  5. Step 5: Solve for x
    x = 6,043,427,029.48/99,608.70
  6. Step 6: Final answer
    x = 60,671.68

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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.