Home / 81,005.25-121,514.22-21,840.02

Finding the Fourth Proportional to 81,005.25, 121,514.22 and 21,840.02

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Solution

The fourth proportional to 81,005.25, 121,514.22 and 21,840.02 is: 32,761.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,005.25 : 121,514.22 = 21,840.02 : x
  2. Step 2: Convert to fraction form
    81,005.25/121,514.22 = 21,840.02/x
  3. Step 3: Cross multiply
    81,005.25x = 121,514.22 × 21,840.02
  4. Step 4: Simplify right side
    81,005.25x = 2,653,872,995.08
  5. Step 5: Solve for x
    x = 2,653,872,995.08/81,005.25
  6. Step 6: Final answer
    x = 32,761.74

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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.