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Finding the Fourth Proportional to 66,776.50, 100,174.61 and 19,391.95

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Solution

The fourth proportional to 66,776.50, 100,174.61 and 19,391.95 is: 29,090.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,776.50 : 100,174.61 = 19,391.95 : x
  2. Step 2: Convert to fraction form
    66,776.50/100,174.61 = 19,391.95/x
  3. Step 3: Cross multiply
    66,776.50x = 100,174.61 × 19,391.95
  4. Step 4: Simplify right side
    66,776.50x = 1,942,581,028.39
  5. Step 5: Solve for x
    x = 1,942,581,028.39/66,776.50
  6. Step 6: Final answer
    x = 29,090.79

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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.