Home / 81,331.60-121,985.02-22,172

Finding the Fourth Proportional to 81,331.60, 121,985.02 and 22,172

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Solution

The fourth proportional to 81,331.60, 121,985.02 and 22,172 is: 33,254.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,331.60 : 121,985.02 = 22,172 : x
  2. Step 2: Convert to fraction form
    81,331.60/121,985.02 = 22,172/x
  3. Step 3: Cross multiply
    81,331.60x = 121,985.02 × 22,172
  4. Step 4: Simplify right side
    81,331.60x = 2,704,651,863.44
  5. Step 5: Solve for x
    x = 2,704,651,863.44/81,331.60
  6. Step 6: Final answer
    x = 33,254.63

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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.