Home / 80,149.50-120,225.87-20,990.34

Finding the Fourth Proportional to 80,149.50, 120,225.87 and 20,990.34

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Solution

The fourth proportional to 80,149.50, 120,225.87 and 20,990.34 is: 31,485.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,149.50 : 120,225.87 = 20,990.34 : x
  2. Step 2: Convert to fraction form
    80,149.50/120,225.87 = 20,990.34/x
  3. Step 3: Cross multiply
    80,149.50x = 120,225.87 × 20,990.34
  4. Step 4: Simplify right side
    80,149.50x = 2,523,581,888.10
  5. Step 5: Solve for x
    x = 2,523,581,888.10/80,149.50
  6. Step 6: Final answer
    x = 31,485.93

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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.