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Finding the Fourth Proportional to 80,004.78, 120,014.01 and 20,840.46

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Solution

The fourth proportional to 80,004.78, 120,014.01 and 20,840.46 is: 31,262.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,004.78 : 120,014.01 = 20,840.46 : x
  2. Step 2: Convert to fraction form
    80,004.78/120,014.01 = 20,840.46/x
  3. Step 3: Cross multiply
    80,004.78x = 120,014.01 × 20,840.46
  4. Step 4: Simplify right side
    80,004.78x = 2,501,147,174.84
  5. Step 5: Solve for x
    x = 2,501,147,174.84/80,004.78
  6. Step 6: Final answer
    x = 31,262.47

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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.