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Finding the Fourth Proportional to 64,939, 89,615.94 and 35,131

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Solution

The fourth proportional to 64,939, 89,615.94 and 35,131 is: 48,480.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,939 : 89,615.94 = 35,131 : x
  2. Step 2: Convert to fraction form
    64,939/89,615.94 = 35,131/x
  3. Step 3: Cross multiply
    64,939x = 89,615.94 × 35,131
  4. Step 4: Simplify right side
    64,939x = 3,148,297,588.14
  5. Step 5: Solve for x
    x = 3,148,297,588.14/64,939
  6. Step 6: Final answer
    x = 48,480.84

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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.