Home / 81,036.92-121,554.41-21,060.11

Finding the Fourth Proportional to 81,036.92, 121,554.41 and 21,060.11

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Solution

The fourth proportional to 81,036.92, 121,554.41 and 21,060.11 is: 31,589.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,036.92 : 121,554.41 = 21,060.11 : x
  2. Step 2: Convert to fraction form
    81,036.92/121,554.41 = 21,060.11/x
  3. Step 3: Cross multiply
    81,036.92x = 121,554.41 × 21,060.11
  4. Step 4: Simplify right side
    81,036.92x = 2,559,948,532.51
  5. Step 5: Solve for x
    x = 2,559,948,532.51/81,036.92
  6. Step 6: Final answer
    x = 31,589.91

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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.