Home / 143,031.85-214,286.13-66,990.77

Finding the Fourth Proportional to 143,031.85, 214,286.13 and 66,990.77

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Solution

The fourth proportional to 143,031.85, 214,286.13 and 66,990.77 is: 100,363.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,031.85 : 214,286.13 = 66,990.77 : x
  2. Step 2: Convert to fraction form
    143,031.85/214,286.13 = 66,990.77/x
  3. Step 3: Cross multiply
    143,031.85x = 214,286.13 × 66,990.77
  4. Step 4: Simplify right side
    143,031.85x = 14,355,193,372.25
  5. Step 5: Solve for x
    x = 14,355,193,372.25/143,031.85
  6. Step 6: Final answer
    x = 100,363.61

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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.