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Finding the Fourth Proportional to 66,891.21, 100,336.60 and 16,971.21

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Solution

The fourth proportional to 66,891.21, 100,336.60 and 16,971.21 is: 25,456.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,891.21 : 100,336.60 = 16,971.21 : x
  2. Step 2: Convert to fraction form
    66,891.21/100,336.60 = 16,971.21/x
  3. Step 3: Cross multiply
    66,891.21x = 100,336.60 × 16,971.21
  4. Step 4: Simplify right side
    66,891.21x = 1,702,833,509.29
  5. Step 5: Solve for x
    x = 1,702,833,509.29/66,891.21
  6. Step 6: Final answer
    x = 25,456.76

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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.