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Finding the Fourth Proportional to 66,649.60, 91,978.92 and 36,436.94

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Solution

The fourth proportional to 66,649.60, 91,978.92 and 36,436.94 is: 50,284.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,649.60 : 91,978.92 = 36,436.94 : x
  2. Step 2: Convert to fraction form
    66,649.60/91,978.92 = 36,436.94/x
  3. Step 3: Cross multiply
    66,649.60x = 91,978.92 × 36,436.94
  4. Step 4: Simplify right side
    66,649.60x = 3,351,430,389.30
  5. Step 5: Solve for x
    x = 3,351,430,389.30/66,649.60
  6. Step 6: Final answer
    x = 50,284.33

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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.