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Finding the Fourth Proportional to 172,998.40, 259,278.90 and 154,190.20

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Solution

The fourth proportional to 172,998.40, 259,278.90 and 154,190.20 is: 231,090.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,998.40 : 259,278.90 = 154,190.20 : x
  2. Step 2: Convert to fraction form
    172,998.40/259,278.90 = 154,190.20/x
  3. Step 3: Cross multiply
    172,998.40x = 259,278.90 × 154,190.20
  4. Step 4: Simplify right side
    172,998.40x = 39,978,265,446.78
  5. Step 5: Solve for x
    x = 39,978,265,446.78/172,998.40
  6. Step 6: Final answer
    x = 231,090.38

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1.5x scale

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.