Home / 81,308.83-121,959.48-21,335.82

Finding the Fourth Proportional to 81,308.83, 121,959.48 and 21,335.82

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Solution

The fourth proportional to 81,308.83, 121,959.48 and 21,335.82 is: 32,002.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,308.83 : 121,959.48 = 21,335.82 : x
  2. Step 2: Convert to fraction form
    81,308.83/121,959.48 = 21,335.82/x
  3. Step 3: Cross multiply
    81,308.83x = 121,959.48 × 21,335.82
  4. Step 4: Simplify right side
    81,308.83x = 2,602,105,512.57
  5. Step 5: Solve for x
    x = 2,602,105,512.57/81,308.83
  6. Step 6: Final answer
    x = 32,002.74

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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.