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Finding the Fourth Proportional to 80,406.99, 120,458.26 and 53,672.37

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Solution

The fourth proportional to 80,406.99, 120,458.26 and 53,672.37 is: 80,406.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,406.99 : 120,458.26 = 53,672.37 : x
  2. Step 2: Convert to fraction form
    80,406.99/120,458.26 = 53,672.37/x
  3. Step 3: Cross multiply
    80,406.99x = 120,458.26 × 53,672.37
  4. Step 4: Simplify right side
    80,406.99x = 6,465,280,291.32
  5. Step 5: Solve for x
    x = 6,465,280,291.32/80,406.99
  6. Step 6: Final answer
    x = 80,406.94

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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.