Home / 81,055.20-121,588.95-21,890.04

Finding the Fourth Proportional to 81,055.20, 121,588.95 and 21,890.04

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Solution

The fourth proportional to 81,055.20, 121,588.95 and 21,890.04 is: 32,836.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,055.20 : 121,588.95 = 21,890.04 : x
  2. Step 2: Convert to fraction form
    81,055.20/121,588.95 = 21,890.04/x
  3. Step 3: Cross multiply
    81,055.20x = 121,588.95 × 21,890.04
  4. Step 4: Simplify right side
    81,055.20x = 2,661,586,979.06
  5. Step 5: Solve for x
    x = 2,661,586,979.06/81,055.20
  6. Step 6: Final answer
    x = 32,836.72

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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.