Home / 80,255.21-120,373.70-21,095.49

Finding the Fourth Proportional to 80,255.21, 120,373.70 and 21,095.49

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Solution

The fourth proportional to 80,255.21, 120,373.70 and 21,095.49 is: 31,640.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,255.21 : 120,373.70 = 21,095.49 : x
  2. Step 2: Convert to fraction form
    80,255.21/120,373.70 = 21,095.49/x
  3. Step 3: Cross multiply
    80,255.21x = 120,373.70 × 21,095.49
  4. Step 4: Simplify right side
    80,255.21x = 2,539,341,853.43
  5. Step 5: Solve for x
    x = 2,539,341,853.43/80,255.21
  6. Step 6: Final answer
    x = 31,640.84

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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.