Home / 81,235.77-121,863.38-28,634.37

Finding the Fourth Proportional to 81,235.77, 121,863.38 and 28,634.37

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Solution

The fourth proportional to 81,235.77, 121,863.38 and 28,634.37 is: 42,954.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,235.77 : 121,863.38 = 28,634.37 : x
  2. Step 2: Convert to fraction form
    81,235.77/121,863.38 = 28,634.37/x
  3. Step 3: Cross multiply
    81,235.77x = 121,863.38 × 28,634.37
  4. Step 4: Simplify right side
    81,235.77x = 3,489,480,969.20
  5. Step 5: Solve for x
    x = 3,489,480,969.20/81,235.77
  6. Step 6: Final answer
    x = 42,954.98

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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.