Home / 133,022.90-199,435.15-80,421.30

Finding the Fourth Proportional to 133,022.90, 199,435.15 and 80,421.30

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Solution

The fourth proportional to 133,022.90, 199,435.15 and 80,421.30 is: 120,571.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,022.90 : 199,435.15 = 80,421.30 : x
  2. Step 2: Convert to fraction form
    133,022.90/199,435.15 = 80,421.30/x
  3. Step 3: Cross multiply
    133,022.90x = 199,435.15 × 80,421.30
  4. Step 4: Simplify right side
    133,022.90x = 16,038,834,028.70
  5. Step 5: Solve for x
    x = 16,038,834,028.70/133,022.90
  6. Step 6: Final answer
    x = 120,571.98

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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.