Home / 80,098.02-120,128.40-30,183.12

Finding the Fourth Proportional to 80,098.02, 120,128.40 and 30,183.12

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Solution

The fourth proportional to 80,098.02, 120,128.40 and 30,183.12 is: 45,267.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,098.02 : 120,128.40 = 30,183.12 : x
  2. Step 2: Convert to fraction form
    80,098.02/120,128.40 = 30,183.12/x
  3. Step 3: Cross multiply
    80,098.02x = 120,128.40 × 30,183.12
  4. Step 4: Simplify right side
    80,098.02x = 3,625,849,912.61
  5. Step 5: Solve for x
    x = 3,625,849,912.61/80,098.02
  6. Step 6: Final answer
    x = 45,267.66

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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.