Home / 80,189.10-120,190.64-30,237.21

Finding the Fourth Proportional to 80,189.10, 120,190.64 and 30,237.21

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Solution

The fourth proportional to 80,189.10, 120,190.64 and 30,237.21 is: 45,320.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,189.10 : 120,190.64 = 30,237.21 : x
  2. Step 2: Convert to fraction form
    80,189.10/120,190.64 = 30,237.21/x
  3. Step 3: Cross multiply
    80,189.10x = 120,190.64 × 30,237.21
  4. Step 4: Simplify right side
    80,189.10x = 3,634,229,470.53
  5. Step 5: Solve for x
    x = 3,634,229,470.53/80,189.10
  6. Step 6: Final answer
    x = 45,320.74

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1.5x scale

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.