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Finding the Fourth Proportional to 77,066.63, 115,599.94 and 21,662.63

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Solution

The fourth proportional to 77,066.63, 115,599.94 and 21,662.63 is: 32,493.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,066.63 : 115,599.94 = 21,662.63 : x
  2. Step 2: Convert to fraction form
    77,066.63/115,599.94 = 21,662.63/x
  3. Step 3: Cross multiply
    77,066.63x = 115,599.94 × 21,662.63
  4. Step 4: Simplify right side
    77,066.63x = 2,504,198,096.09
  5. Step 5: Solve for x
    x = 2,504,198,096.09/77,066.63
  6. Step 6: Final answer
    x = 32,493.94

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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.