Home / 80,769.86-121,154.91-21,605.54

Finding the Fourth Proportional to 80,769.86, 121,154.91 and 21,605.54

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Solution

The fourth proportional to 80,769.86, 121,154.91 and 21,605.54 is: 32,408.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,769.86 : 121,154.91 = 21,605.54 : x
  2. Step 2: Convert to fraction form
    80,769.86/121,154.91 = 21,605.54/x
  3. Step 3: Cross multiply
    80,769.86x = 121,154.91 × 21,605.54
  4. Step 4: Simplify right side
    80,769.86x = 2,617,616,648.43
  5. Step 5: Solve for x
    x = 2,617,616,648.43/80,769.86
  6. Step 6: Final answer
    x = 32,408.34

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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.