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Finding the Fourth Proportional to 66,751.99, 100,137.71 and 20,008.51

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Solution

The fourth proportional to 66,751.99, 100,137.71 and 20,008.51 is: 30,015.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,751.99 : 100,137.71 = 20,008.51 : x
  2. Step 2: Convert to fraction form
    66,751.99/100,137.71 = 20,008.51/x
  3. Step 3: Cross multiply
    66,751.99x = 100,137.71 × 20,008.51
  4. Step 4: Simplify right side
    66,751.99x = 2,003,606,371.91
  5. Step 5: Solve for x
    x = 2,003,606,371.91/66,751.99
  6. Step 6: Final answer
    x = 30,015.68

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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.