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Finding the Fourth Proportional to 200,028.80, 300,043.20 and 66,864.80

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Solution

The fourth proportional to 200,028.80, 300,043.20 and 66,864.80 is: 100,297.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,028.80 : 300,043.20 = 66,864.80 : x
  2. Step 2: Convert to fraction form
    200,028.80/300,043.20 = 66,864.80/x
  3. Step 3: Cross multiply
    200,028.80x = 300,043.20 × 66,864.80
  4. Step 4: Simplify right side
    200,028.80x = 20,062,328,559.36
  5. Step 5: Solve for x
    x = 20,062,328,559.36/200,028.80
  6. Step 6: Final answer
    x = 100,297.20

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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.