Home / 209,172.15-313,725.20-90,811.71

Finding the Fourth Proportional to 209,172.15, 313,725.20 and 90,811.71

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Solution

The fourth proportional to 209,172.15, 313,725.20 and 90,811.71 is: 136,203.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,172.15 : 313,725.20 = 90,811.71 : x
  2. Step 2: Convert to fraction form
    209,172.15/313,725.20 = 90,811.71/x
  3. Step 3: Cross multiply
    209,172.15x = 313,725.20 × 90,811.71
  4. Step 4: Simplify right side
    209,172.15x = 28,489,921,428.03
  5. Step 5: Solve for x
    x = 28,489,921,428.03/209,172.15
  6. Step 6: Final answer
    x = 136,203.23

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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.