Home / 72,999.12-109,499.04-20,408.76

Finding the Fourth Proportional to 72,999.12, 109,499.04 and 20,408.76

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Solution

The fourth proportional to 72,999.12, 109,499.04 and 20,408.76 is: 30,613.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,999.12 : 109,499.04 = 20,408.76 : x
  2. Step 2: Convert to fraction form
    72,999.12/109,499.04 = 20,408.76/x
  3. Step 3: Cross multiply
    72,999.12x = 109,499.04 × 20,408.76
  4. Step 4: Simplify right side
    72,999.12x = 2,234,739,627.59
  5. Step 5: Solve for x
    x = 2,234,739,627.59/72,999.12
  6. Step 6: Final answer
    x = 30,613.24

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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.