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Finding the Fourth Proportional to 172,066.81, 258,100.21 and 66,910.38

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Solution

The fourth proportional to 172,066.81, 258,100.21 and 66,910.38 is: 100,365.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,066.81 : 258,100.21 = 66,910.38 : x
  2. Step 2: Convert to fraction form
    172,066.81/258,100.21 = 66,910.38/x
  3. Step 3: Cross multiply
    172,066.81x = 258,100.21 × 66,910.38
  4. Step 4: Simplify right side
    172,066.81x = 17,269,583,296.46
  5. Step 5: Solve for x
    x = 17,269,583,296.46/172,066.81
  6. Step 6: Final answer
    x = 100,365.57

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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.