Home / 80,906.10-121,376.66-30,986.21

Finding the Fourth Proportional to 80,906.10, 121,376.66 and 30,986.21

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Solution

The fourth proportional to 80,906.10, 121,376.66 and 30,986.21 is: 46,486.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,906.10 : 121,376.66 = 30,986.21 : x
  2. Step 2: Convert to fraction form
    80,906.10/121,376.66 = 30,986.21/x
  3. Step 3: Cross multiply
    80,906.10x = 121,376.66 × 30,986.21
  4. Step 4: Simplify right side
    80,906.10x = 3,761,001,914.04
  5. Step 5: Solve for x
    x = 3,761,001,914.04/80,906.10
  6. Step 6: Final answer
    x = 46,486.01

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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.