Home / 136,939.20-205,562.40-81,566.40

Finding the Fourth Proportional to 136,939.20, 205,562.40 and 81,566.40

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Solution

The fourth proportional to 136,939.20, 205,562.40 and 81,566.40 is: 122,441.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,939.20 : 205,562.40 = 81,566.40 : x
  2. Step 2: Convert to fraction form
    136,939.20/205,562.40 = 81,566.40/x
  3. Step 3: Cross multiply
    136,939.20x = 205,562.40 × 81,566.40
  4. Step 4: Simplify right side
    136,939.20x = 16,766,984,943.36
  5. Step 5: Solve for x
    x = 16,766,984,943.36/136,939.20
  6. Step 6: Final answer
    x = 122,441.09

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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.