Home / 136,936.20-205,557.90-81,563.40

Finding the Fourth Proportional to 136,936.20, 205,557.90 and 81,563.40

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Solution

The fourth proportional to 136,936.20, 205,557.90 and 81,563.40 is: 122,436.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,936.20 : 205,557.90 = 81,563.40 : x
  2. Step 2: Convert to fraction form
    136,936.20/205,557.90 = 81,563.40/x
  3. Step 3: Cross multiply
    136,936.20x = 205,557.90 × 81,563.40
  4. Step 4: Simplify right side
    136,936.20x = 16,766,001,220.86
  5. Step 5: Solve for x
    x = 16,766,001,220.86/136,936.20
  6. Step 6: Final answer
    x = 122,436.59

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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.