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Finding the Fourth Proportional to 136,689.63, 205,040.62 and 41,912.89

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Solution

The fourth proportional to 136,689.63, 205,040.62 and 41,912.89 is: 62,871.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,689.63 : 205,040.62 = 41,912.89 : x
  2. Step 2: Convert to fraction form
    136,689.63/205,040.62 = 41,912.89/x
  3. Step 3: Cross multiply
    136,689.63x = 205,040.62 × 41,912.89
  4. Step 4: Simplify right side
    136,689.63x = 8,593,844,951.59
  5. Step 5: Solve for x
    x = 8,593,844,951.59/136,689.63
  6. Step 6: Final answer
    x = 62,871.23

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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.