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Finding the Fourth Proportional to 66,679.68, 100,004.64 and 19,926.48

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Solution

The fourth proportional to 66,679.68, 100,004.64 and 19,926.48 is: 29,885.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,679.68 : 100,004.64 = 19,926.48 : x
  2. Step 2: Convert to fraction form
    66,679.68/100,004.64 = 19,926.48/x
  3. Step 3: Cross multiply
    66,679.68x = 100,004.64 × 19,926.48
  4. Step 4: Simplify right side
    66,679.68x = 1,992,740,458.87
  5. Step 5: Solve for x
    x = 1,992,740,458.87/66,679.68
  6. Step 6: Final answer
    x = 29,885.27

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1.5x scale

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.