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Finding the Fourth Proportional to 128,438.59, 192,610.09 and 44,175.10

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Solution

The fourth proportional to 128,438.59, 192,610.09 and 44,175.10 is: 66,246.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,438.59 : 192,610.09 = 44,175.10 : x
  2. Step 2: Convert to fraction form
    128,438.59/192,610.09 = 44,175.10/x
  3. Step 3: Cross multiply
    128,438.59x = 192,610.09 × 44,175.10
  4. Step 4: Simplify right side
    128,438.59x = 8,508,569,986.76
  5. Step 5: Solve for x
    x = 8,508,569,986.76/128,438.59
  6. Step 6: Final answer
    x = 66,246.21

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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.