Home / 80,621.58-120,931.98-20,649.94

Finding the Fourth Proportional to 80,621.58, 120,931.98 and 20,649.94

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Solution

The fourth proportional to 80,621.58, 120,931.98 and 20,649.94 is: 30,974.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,621.58 : 120,931.98 = 20,649.94 : x
  2. Step 2: Convert to fraction form
    80,621.58/120,931.98 = 20,649.94/x
  3. Step 3: Cross multiply
    80,621.58x = 120,931.98 × 20,649.94
  4. Step 4: Simplify right side
    80,621.58x = 2,497,238,131.08
  5. Step 5: Solve for x
    x = 2,497,238,131.08/80,621.58
  6. Step 6: Final answer
    x = 30,974.81

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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.