Home / 136,988.20-205,520.70-66,869.80

Finding the Fourth Proportional to 136,988.20, 205,520.70 and 66,869.80

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Solution

The fourth proportional to 136,988.20, 205,520.70 and 66,869.80 is: 100,323.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,988.20 : 205,520.70 = 66,869.80 : x
  2. Step 2: Convert to fraction form
    136,988.20/205,520.70 = 66,869.80/x
  3. Step 3: Cross multiply
    136,988.20x = 205,520.70 × 66,869.80
  4. Step 4: Simplify right side
    136,988.20x = 13,743,128,104.86
  5. Step 5: Solve for x
    x = 13,743,128,104.86/136,988.20
  6. Step 6: Final answer
    x = 100,323.44

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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.