Home / 143,435.40-215,153.10-80,190.60

Finding the Fourth Proportional to 143,435.40, 215,153.10 and 80,190.60

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Solution

The fourth proportional to 143,435.40, 215,153.10 and 80,190.60 is: 120,285.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,435.40 : 215,153.10 = 80,190.60 : x
  2. Step 2: Convert to fraction form
    143,435.40/215,153.10 = 80,190.60/x
  3. Step 3: Cross multiply
    143,435.40x = 215,153.10 × 80,190.60
  4. Step 4: Simplify right side
    143,435.40x = 17,253,256,180.86
  5. Step 5: Solve for x
    x = 17,253,256,180.86/143,435.40
  6. Step 6: Final answer
    x = 120,285.90

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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.