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Finding the Fourth Proportional to 80,004.77, 120,007.11 and 20,840.30

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Solution

The fourth proportional to 80,004.77, 120,007.11 and 20,840.30 is: 31,260.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,004.77 : 120,007.11 = 20,840.30 : x
  2. Step 2: Convert to fraction form
    80,004.77/120,007.11 = 20,840.30/x
  3. Step 3: Cross multiply
    80,004.77x = 120,007.11 × 20,840.30
  4. Step 4: Simplify right side
    80,004.77x = 2,500,984,174.53
  5. Step 5: Solve for x
    x = 2,500,984,174.53/80,004.77
  6. Step 6: Final answer
    x = 31,260.44

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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.