Home / 81,009.71-121,514.22-21,851.36

Finding the Fourth Proportional to 81,009.71, 121,514.22 and 21,851.36

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Solution

The fourth proportional to 81,009.71, 121,514.22 and 21,851.36 is: 32,776.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,009.71 : 121,514.22 = 21,851.36 : x
  2. Step 2: Convert to fraction form
    81,009.71/121,514.22 = 21,851.36/x
  3. Step 3: Cross multiply
    81,009.71x = 121,514.22 × 21,851.36
  4. Step 4: Simplify right side
    81,009.71x = 2,655,250,966.34
  5. Step 5: Solve for x
    x = 2,655,250,966.34/81,009.71
  6. Step 6: Final answer
    x = 32,776.95

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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.