Home / 80,989.61-121,487.25-21,826.68

Finding the Fourth Proportional to 80,989.61, 121,487.25 and 21,826.68

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Solution

The fourth proportional to 80,989.61, 121,487.25 and 21,826.68 is: 32,740.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,989.61 : 121,487.25 = 21,826.68 : x
  2. Step 2: Convert to fraction form
    80,989.61/121,487.25 = 21,826.68/x
  3. Step 3: Cross multiply
    80,989.61x = 121,487.25 × 21,826.68
  4. Step 4: Simplify right side
    80,989.61x = 2,651,663,329.83
  5. Step 5: Solve for x
    x = 2,651,663,329.83/80,989.61
  6. Step 6: Final answer
    x = 32,740.79

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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.