Home / 81,026.73-121,540.09-21,862.40

Finding the Fourth Proportional to 81,026.73, 121,540.09 and 21,862.40

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Solution

The fourth proportional to 81,026.73, 121,540.09 and 21,862.40 is: 32,793.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,026.73 : 121,540.09 = 21,862.40 : x
  2. Step 2: Convert to fraction form
    81,026.73/121,540.09 = 21,862.40/x
  3. Step 3: Cross multiply
    81,026.73x = 121,540.09 × 21,862.40
  4. Step 4: Simplify right side
    81,026.73x = 2,657,158,047.23
  5. Step 5: Solve for x
    x = 2,657,158,047.23/81,026.73
  6. Step 6: Final answer
    x = 32,793.60

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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.