Home / 133,089.12-199,408.11-80,387.88

Finding the Fourth Proportional to 133,089.12, 199,408.11 and 80,387.88

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Solution

The fourth proportional to 133,089.12, 199,408.11 and 80,387.88 is: 120,445.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,089.12 : 199,408.11 = 80,387.88 : x
  2. Step 2: Convert to fraction form
    133,089.12/199,408.11 = 80,387.88/x
  3. Step 3: Cross multiply
    133,089.12x = 199,408.11 × 80,387.88
  4. Step 4: Simplify right side
    133,089.12x = 16,029,995,217.71
  5. Step 5: Solve for x
    x = 16,029,995,217.71/133,089.12
  6. Step 6: Final answer
    x = 120,445.57

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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.