Home / 80,725.66-121,022.88-28,172.05

Finding the Fourth Proportional to 80,725.66, 121,022.88 and 28,172.05

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Solution

The fourth proportional to 80,725.66, 121,022.88 and 28,172.05 is: 42,235.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,725.66 : 121,022.88 = 28,172.05 : x
  2. Step 2: Convert to fraction form
    80,725.66/121,022.88 = 28,172.05/x
  3. Step 3: Cross multiply
    80,725.66x = 121,022.88 × 28,172.05
  4. Step 4: Simplify right side
    80,725.66x = 3,409,462,626.50
  5. Step 5: Solve for x
    x = 3,409,462,626.50/80,725.66
  6. Step 6: Final answer
    x = 42,235.18

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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.