Home / 209,156.22-313,755.05-66,965.72

Finding the Fourth Proportional to 209,156.22, 313,755.05 and 66,965.72

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Solution

The fourth proportional to 209,156.22, 313,755.05 and 66,965.72 is: 100,455.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,156.22 : 313,755.05 = 66,965.72 : x
  2. Step 2: Convert to fraction form
    209,156.22/313,755.05 = 66,965.72/x
  3. Step 3: Cross multiply
    209,156.22x = 313,755.05 × 66,965.72
  4. Step 4: Simplify right side
    209,156.22x = 21,010,831,425.53
  5. Step 5: Solve for x
    x = 21,010,831,425.53/209,156.22
  6. Step 6: Final answer
    x = 100,455.21

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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.