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Finding the Fourth Proportional to 70,504.50, 105,746.34 and 20,571.20

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Solution

The fourth proportional to 70,504.50, 105,746.34 and 20,571.20 is: 30,853.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,504.50 : 105,746.34 = 20,571.20 : x
  2. Step 2: Convert to fraction form
    70,504.50/105,746.34 = 20,571.20/x
  3. Step 3: Cross multiply
    70,504.50x = 105,746.34 × 20,571.20
  4. Step 4: Simplify right side
    70,504.50x = 2,175,328,580.68
  5. Step 5: Solve for x
    x = 2,175,328,580.68/70,504.50
  6. Step 6: Final answer
    x = 30,853.76

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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.