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Finding the Fourth Proportional to 68,993,670.60, 103,490,505.90 and 20,479,012.20

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Solution

The fourth proportional to 68,993,670.60, 103,490,505.90 and 20,479,012.20 is: 30,718,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,993,670.60 : 103,490,505.90 = 20,479,012.20 : x
  2. Step 2: Convert to fraction form
    68,993,670.60/103,490,505.90 = 20,479,012.20/x
  3. Step 3: Cross multiply
    68,993,670.60x = 103,490,505.90 × 20,479,012.20
  4. Step 4: Simplify right side
    68,993,670.60x = 2,119,383,332,910,272
  5. Step 5: Solve for x
    x = 2,119,383,332,910,272/68,993,670.60
  6. Step 6: Final answer
    x = 30,718,518.30

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Similar ratio
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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.