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Finding the Fourth Proportional to 80,418.52, 120,609.42 and 30,504.16

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Solution

The fourth proportional to 80,418.52, 120,609.42 and 30,504.16 is: 45,749.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,418.52 : 120,609.42 = 30,504.16 : x
  2. Step 2: Convert to fraction form
    80,418.52/120,609.42 = 30,504.16/x
  3. Step 3: Cross multiply
    80,418.52x = 120,609.42 × 30,504.16
  4. Step 4: Simplify right side
    80,418.52x = 3,679,089,045.19
  5. Step 5: Solve for x
    x = 3,679,089,045.19/80,418.52
  6. Step 6: Final answer
    x = 45,749.28

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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.