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Finding the Fourth Proportional to 66,645.47, 91,911.17 and 55,296.99

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Solution

The fourth proportional to 66,645.47, 91,911.17 and 55,296.99 is: 76,260.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,645.47 : 91,911.17 = 55,296.99 : x
  2. Step 2: Convert to fraction form
    66,645.47/91,911.17 = 55,296.99/x
  3. Step 3: Cross multiply
    66,645.47x = 91,911.17 × 55,296.99
  4. Step 4: Simplify right side
    66,645.47x = 5,082,410,771.89
  5. Step 5: Solve for x
    x = 5,082,410,771.89/66,645.47
  6. Step 6: Final answer
    x = 76,260.41

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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.