Home / 80,020.24-120,030.40-20,855.76

Finding the Fourth Proportional to 80,020.24, 120,030.40 and 20,855.76

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Solution

The fourth proportional to 80,020.24, 120,030.40 and 20,855.76 is: 31,283.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,020.24 : 120,030.40 = 20,855.76 : x
  2. Step 2: Convert to fraction form
    80,020.24/120,030.40 = 20,855.76/x
  3. Step 3: Cross multiply
    80,020.24x = 120,030.40 × 20,855.76
  4. Step 4: Simplify right side
    80,020.24x = 2,503,325,215.10
  5. Step 5: Solve for x
    x = 2,503,325,215.10/80,020.24
  6. Step 6: Final answer
    x = 31,283.65

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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.