Home / 80,721.36-121,109.26-35,736.50

Finding the Fourth Proportional to 80,721.36, 121,109.26 and 35,736.50

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Solution

The fourth proportional to 80,721.36, 121,109.26 and 35,736.50 is: 53,616.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,721.36 : 121,109.26 = 35,736.50 : x
  2. Step 2: Convert to fraction form
    80,721.36/121,109.26 = 35,736.50/x
  3. Step 3: Cross multiply
    80,721.36x = 121,109.26 × 35,736.50
  4. Step 4: Simplify right side
    80,721.36x = 4,328,021,416.04
  5. Step 5: Solve for x
    x = 4,328,021,416.04/80,721.36
  6. Step 6: Final answer
    x = 53,616.81

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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.