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Finding the Fourth Proportional to 66,687.28, 100,046.48 and 19,300.48

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Solution

The fourth proportional to 66,687.28, 100,046.48 and 19,300.48 is: 28,955.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,687.28 : 100,046.48 = 19,300.48 : x
  2. Step 2: Convert to fraction form
    66,687.28/100,046.48 = 19,300.48/x
  3. Step 3: Cross multiply
    66,687.28x = 100,046.48 × 19,300.48
  4. Step 4: Simplify right side
    66,687.28x = 1,930,945,086.31
  5. Step 5: Solve for x
    x = 1,930,945,086.31/66,687.28
  6. Step 6: Final answer
    x = 28,955.22

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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.