Home / 143,279.80-214,919.70-128,517.55

Finding the Fourth Proportional to 143,279.80, 214,919.70 and 128,517.55

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Solution

The fourth proportional to 143,279.80, 214,919.70 and 128,517.55 is: 192,776.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,279.80 : 214,919.70 = 128,517.55 : x
  2. Step 2: Convert to fraction form
    143,279.80/214,919.70 = 128,517.55/x
  3. Step 3: Cross multiply
    143,279.80x = 214,919.70 × 128,517.55
  4. Step 4: Simplify right side
    143,279.80x = 27,620,953,290.74
  5. Step 5: Solve for x
    x = 27,620,953,290.74/143,279.80
  6. Step 6: Final answer
    x = 192,776.33

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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.