Home / 136,986.20-205,517.70-66,867.80

Finding the Fourth Proportional to 136,986.20, 205,517.70 and 66,867.80

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Solution

The fourth proportional to 136,986.20, 205,517.70 and 66,867.80 is: 100,320.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,986.20 : 205,517.70 = 66,867.80 : x
  2. Step 2: Convert to fraction form
    136,986.20/205,517.70 = 66,867.80/x
  3. Step 3: Cross multiply
    136,986.20x = 205,517.70 × 66,867.80
  4. Step 4: Simplify right side
    136,986.20x = 13,742,516,460.06
  5. Step 5: Solve for x
    x = 13,742,516,460.06/136,986.20
  6. Step 6: Final answer
    x = 100,320.44

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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.