Home / 80,206.12-120,272.05-45,145.77

Finding the Fourth Proportional to 80,206.12, 120,272.05 and 45,145.77

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Solution

The fourth proportional to 80,206.12, 120,272.05 and 45,145.77 is: 67,697.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,206.12 : 120,272.05 = 45,145.77 : x
  2. Step 2: Convert to fraction form
    80,206.12/120,272.05 = 45,145.77/x
  3. Step 3: Cross multiply
    80,206.12x = 120,272.05 × 45,145.77
  4. Step 4: Simplify right side
    80,206.12x = 5,429,774,306.73
  5. Step 5: Solve for x
    x = 5,429,774,306.73/80,206.12
  6. Step 6: Final answer
    x = 67,697.76

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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.