Home / 80,985.71-121,481.42-21,822.81

Finding the Fourth Proportional to 80,985.71, 121,481.42 and 21,822.81

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Solution

The fourth proportional to 80,985.71, 121,481.42 and 21,822.81 is: 32,734.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,985.71 : 121,481.42 = 21,822.81 : x
  2. Step 2: Convert to fraction form
    80,985.71/121,481.42 = 21,822.81/x
  3. Step 3: Cross multiply
    80,985.71x = 121,481.42 × 21,822.81
  4. Step 4: Simplify right side
    80,985.71x = 2,651,065,947.19
  5. Step 5: Solve for x
    x = 2,651,065,947.19/80,985.71
  6. Step 6: Final answer
    x = 32,734.98

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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.