Home / 81,091.23-121,623.63-28,488.41

Finding the Fourth Proportional to 81,091.23, 121,623.63 and 28,488.41

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Solution

The fourth proportional to 81,091.23, 121,623.63 and 28,488.41 is: 42,727.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,091.23 : 121,623.63 = 28,488.41 : x
  2. Step 2: Convert to fraction form
    81,091.23/121,623.63 = 28,488.41/x
  3. Step 3: Cross multiply
    81,091.23x = 121,623.63 × 28,488.41
  4. Step 4: Simplify right side
    81,091.23x = 3,464,863,578.27
  5. Step 5: Solve for x
    x = 3,464,863,578.27/81,091.23
  6. Step 6: Final answer
    x = 42,727.97

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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.