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Finding the Fourth Proportional to 66,679.88, 100,019.82 and 19,931.24

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Solution

The fourth proportional to 66,679.88, 100,019.82 and 19,931.24 is: 29,896.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,679.88 : 100,019.82 = 19,931.24 : x
  2. Step 2: Convert to fraction form
    66,679.88/100,019.82 = 19,931.24/x
  3. Step 3: Cross multiply
    66,679.88x = 100,019.82 × 19,931.24
  4. Step 4: Simplify right side
    66,679.88x = 1,993,519,037.18
  5. Step 5: Solve for x
    x = 1,993,519,037.18/66,679.88
  6. Step 6: Final answer
    x = 29,896.86

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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.