Home / 81,020.22-121,542.47-28,420.44

Finding the Fourth Proportional to 81,020.22, 121,542.47 and 28,420.44

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Solution

The fourth proportional to 81,020.22, 121,542.47 and 28,420.44 is: 42,634.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,020.22 : 121,542.47 = 28,420.44 : x
  2. Step 2: Convert to fraction form
    81,020.22/121,542.47 = 28,420.44/x
  3. Step 3: Cross multiply
    81,020.22x = 121,542.47 × 28,420.44
  4. Step 4: Simplify right side
    81,020.22x = 3,454,290,476.09
  5. Step 5: Solve for x
    x = 3,454,290,476.09/81,020.22
  6. Step 6: Final answer
    x = 42,634.92

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1.5x scale

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.