Home / 81,036.73-121,555.05-21,872.38

Finding the Fourth Proportional to 81,036.73, 121,555.05 and 21,872.38

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Solution

The fourth proportional to 81,036.73, 121,555.05 and 21,872.38 is: 32,808.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,036.73 : 121,555.05 = 21,872.38 : x
  2. Step 2: Convert to fraction form
    81,036.73/121,555.05 = 21,872.38/x
  3. Step 3: Cross multiply
    81,036.73x = 121,555.05 × 21,872.38
  4. Step 4: Simplify right side
    81,036.73x = 2,658,698,271.07
  5. Step 5: Solve for x
    x = 2,658,698,271.07/81,036.73
  6. Step 6: Final answer
    x = 32,808.56

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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.