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Finding the Fourth Proportional to 70,113.26, 105,170.81 and 20,194.18

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Solution

The fourth proportional to 70,113.26, 105,170.81 and 20,194.18 is: 30,291.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,113.26 : 105,170.81 = 20,194.18 : x
  2. Step 2: Convert to fraction form
    70,113.26/105,170.81 = 20,194.18/x
  3. Step 3: Cross multiply
    70,113.26x = 105,170.81 × 20,194.18
  4. Step 4: Simplify right side
    70,113.26x = 2,123,837,903.99
  5. Step 5: Solve for x
    x = 2,123,837,903.99/70,113.26
  6. Step 6: Final answer
    x = 30,291.53

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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.