Home / 81,203.22-121,840.43-38,539.46

Finding the Fourth Proportional to 81,203.22, 121,840.43 and 38,539.46

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Solution

The fourth proportional to 81,203.22, 121,840.43 and 38,539.46 is: 57,826.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,203.22 : 121,840.43 = 38,539.46 : x
  2. Step 2: Convert to fraction form
    81,203.22/121,840.43 = 38,539.46/x
  3. Step 3: Cross multiply
    81,203.22x = 121,840.43 × 38,539.46
  4. Step 4: Simplify right side
    81,203.22x = 4,695,664,378.37
  5. Step 5: Solve for x
    x = 4,695,664,378.37/81,203.22
  6. Step 6: Final answer
    x = 57,826.09

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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.