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Finding the Fourth Proportional to 64,657.43, 96,986.15 and 20,287.73

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Solution

The fourth proportional to 64,657.43, 96,986.15 and 20,287.73 is: 30,431.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,657.43 : 96,986.15 = 20,287.73 : x
  2. Step 2: Convert to fraction form
    64,657.43/96,986.15 = 20,287.73/x
  3. Step 3: Cross multiply
    64,657.43x = 96,986.15 × 20,287.73
  4. Step 4: Simplify right side
    64,657.43x = 1,967,628,723.50
  5. Step 5: Solve for x
    x = 1,967,628,723.50/64,657.43
  6. Step 6: Final answer
    x = 30,431.60

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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.