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Finding the Fourth Proportional to 67,112.75, 100,669.73 and 20,365.63

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Solution

The fourth proportional to 67,112.75, 100,669.73 and 20,365.63 is: 30,548.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,112.75 : 100,669.73 = 20,365.63 : x
  2. Step 2: Convert to fraction form
    67,112.75/100,669.73 = 20,365.63/x
  3. Step 3: Cross multiply
    67,112.75x = 100,669.73 × 20,365.63
  4. Step 4: Simplify right side
    67,112.75x = 2,050,202,473.38
  5. Step 5: Solve for x
    x = 2,050,202,473.38/67,112.75
  6. Step 6: Final answer
    x = 30,548.63

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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.