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Finding the Fourth Proportional to 80,402.36, 120,511.60 and 38,222.60

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Solution

The fourth proportional to 80,402.36, 120,511.60 and 38,222.60 is: 57,290.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,402.36 : 120,511.60 = 38,222.60 : x
  2. Step 2: Convert to fraction form
    80,402.36/120,511.60 = 38,222.60/x
  3. Step 3: Cross multiply
    80,402.36x = 120,511.60 × 38,222.60
  4. Step 4: Simplify right side
    80,402.36x = 4,606,266,682.16
  5. Step 5: Solve for x
    x = 4,606,266,682.16/80,402.36
  6. Step 6: Final answer
    x = 57,290.19

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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.