Home / 80,821.08-121,287.09-28,230.66

Finding the Fourth Proportional to 80,821.08, 121,287.09 and 28,230.66

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Solution

The fourth proportional to 80,821.08, 121,287.09 and 28,230.66 is: 42,365.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,821.08 : 121,287.09 = 28,230.66 : x
  2. Step 2: Convert to fraction form
    80,821.08/121,287.09 = 28,230.66/x
  3. Step 3: Cross multiply
    80,821.08x = 121,287.09 × 28,230.66
  4. Step 4: Simplify right side
    80,821.08x = 3,424,014,600.18
  5. Step 5: Solve for x
    x = 3,424,014,600.18/80,821.08
  6. Step 6: Final answer
    x = 42,365.37

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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.