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Finding the Fourth Proportional to 70,171.27, 105,274.32 and 20,250.16

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Solution

The fourth proportional to 70,171.27, 105,274.32 and 20,250.16 is: 30,380.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,171.27 : 105,274.32 = 20,250.16 : x
  2. Step 2: Convert to fraction form
    70,171.27/105,274.32 = 20,250.16/x
  3. Step 3: Cross multiply
    70,171.27x = 105,274.32 × 20,250.16
  4. Step 4: Simplify right side
    70,171.27x = 2,131,821,823.89
  5. Step 5: Solve for x
    x = 2,131,821,823.89/70,171.27
  6. Step 6: Final answer
    x = 30,380.27

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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.