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Finding the Fourth Proportional to 136,340.65, 204,540.30 and 67,989.45

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Solution

The fourth proportional to 136,340.65, 204,540.30 and 67,989.45 is: 101,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,340.65 : 204,540.30 = 67,989.45 : x
  2. Step 2: Convert to fraction form
    136,340.65/204,540.30 = 67,989.45/x
  3. Step 3: Cross multiply
    136,340.65x = 204,540.30 × 67,989.45
  4. Step 4: Simplify right side
    136,340.65x = 13,906,582,499.84
  5. Step 5: Solve for x
    x = 13,906,582,499.84/136,340.65
  6. Step 6: Final answer
    x = 101,998.80

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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.