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Finding the Fourth Proportional to 66,649.60, 91,992 and 43,992.64

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Solution

The fourth proportional to 66,649.60, 91,992 and 43,992.64 is: 60,720.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,649.60 : 91,992 = 43,992.64 : x
  2. Step 2: Convert to fraction form
    66,649.60/91,992 = 43,992.64/x
  3. Step 3: Cross multiply
    66,649.60x = 91,992 × 43,992.64
  4. Step 4: Simplify right side
    66,649.60x = 4,046,970,938.88
  5. Step 5: Solve for x
    x = 4,046,970,938.88/66,649.60
  6. Step 6: Final answer
    x = 60,720.11

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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.