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Finding the Fourth Proportional to 66,687.68, 100,016.64 and 19,934.48

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Solution

The fourth proportional to 66,687.68, 100,016.64 and 19,934.48 is: 29,897.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,687.68 : 100,016.64 = 19,934.48 : x
  2. Step 2: Convert to fraction form
    66,687.68/100,016.64 = 19,934.48/x
  3. Step 3: Cross multiply
    66,687.68x = 100,016.64 × 19,934.48
  4. Step 4: Simplify right side
    66,687.68x = 1,993,779,709.75
  5. Step 5: Solve for x
    x = 1,993,779,709.75/66,687.68
  6. Step 6: Final answer
    x = 29,897.27

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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.