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Finding the Fourth Proportional to 64,968.73, 89,655.91 and 36,288.80

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Solution

The fourth proportional to 64,968.73, 89,655.91 and 36,288.80 is: 50,078.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,968.73 : 89,655.91 = 36,288.80 : x
  2. Step 2: Convert to fraction form
    64,968.73/89,655.91 = 36,288.80/x
  3. Step 3: Cross multiply
    64,968.73x = 89,655.91 × 36,288.80
  4. Step 4: Simplify right side
    64,968.73x = 3,253,505,474.86
  5. Step 5: Solve for x
    x = 3,253,505,474.86/64,968.73
  6. Step 6: Final answer
    x = 50,078.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.