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Finding the Fourth Proportional to 172,998.80, 238,744.25 and 100,396.09

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Solution

The fourth proportional to 172,998.80, 238,744.25 and 100,396.09 is: 138,550.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,998.80 : 238,744.25 = 100,396.09 : x
  2. Step 2: Convert to fraction form
    172,998.80/238,744.25 = 100,396.09/x
  3. Step 3: Cross multiply
    172,998.80x = 238,744.25 × 100,396.09
  4. Step 4: Simplify right side
    172,998.80x = 23,968,989,209.98
  5. Step 5: Solve for x
    x = 23,968,989,209.98/172,998.80
  6. Step 6: Final answer
    x = 138,550.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.