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Finding the Fourth Proportional to 67,112.55, 100,669.43 and 20,365.42

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Solution

The fourth proportional to 67,112.55, 100,669.43 and 20,365.42 is: 30,548.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,112.55 : 100,669.43 = 20,365.42 : x
  2. Step 2: Convert to fraction form
    67,112.55/100,669.43 = 20,365.42/x
  3. Step 3: Cross multiply
    67,112.55x = 100,669.43 × 20,365.42
  4. Step 4: Simplify right side
    67,112.55x = 2,050,175,423.87
  5. Step 5: Solve for x
    x = 2,050,175,423.87/67,112.55
  6. Step 6: Final answer
    x = 30,548.32

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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.