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Finding the Fourth Proportional to 66,750.99, 100,136.21 and 20,007.51

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Solution

The fourth proportional to 66,750.99, 100,136.21 and 20,007.51 is: 30,014.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,750.99 : 100,136.21 = 20,007.51 : x
  2. Step 2: Convert to fraction form
    66,750.99/100,136.21 = 20,007.51/x
  3. Step 3: Cross multiply
    66,750.99x = 100,136.21 × 20,007.51
  4. Step 4: Simplify right side
    66,750.99x = 2,003,476,122.90
  5. Step 5: Solve for x
    x = 2,003,476,122.90/66,750.99
  6. Step 6: Final answer
    x = 30,014.18

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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.