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Finding the Fourth Proportional to 81,308.76, 121,959.48 and 33,904.32

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Solution

The fourth proportional to 81,308.76, 121,959.48 and 33,904.32 is: 50,854.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,308.76 : 121,959.48 = 33,904.32 : x
  2. Step 2: Convert to fraction form
    81,308.76/121,959.48 = 33,904.32/x
  3. Step 3: Cross multiply
    81,308.76x = 121,959.48 × 33,904.32
  4. Step 4: Simplify right side
    81,308.76x = 4,134,953,236.95
  5. Step 5: Solve for x
    x = 4,134,953,236.95/81,308.76
  6. Step 6: Final answer
    x = 50,854.95

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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.