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Finding the Fourth Proportional to 132,439.99, 198,684.42 and 43,699.63

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Solution

The fourth proportional to 132,439.99, 198,684.42 and 43,699.63 is: 65,557.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,439.99 : 198,684.42 = 43,699.63 : x
  2. Step 2: Convert to fraction form
    132,439.99/198,684.42 = 43,699.63/x
  3. Step 3: Cross multiply
    132,439.99x = 198,684.42 × 43,699.63
  4. Step 4: Simplify right side
    132,439.99x = 8,682,435,640.76
  5. Step 5: Solve for x
    x = 8,682,435,640.76/132,439.99
  6. Step 6: Final answer
    x = 65,557.51

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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.