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Finding the Fourth Proportional to 200,052.20, 300,078.30 and 121,320.20

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Solution

The fourth proportional to 200,052.20, 300,078.30 and 121,320.20 is: 181,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,052.20 : 300,078.30 = 121,320.20 : x
  2. Step 2: Convert to fraction form
    200,052.20/300,078.30 = 121,320.20/x
  3. Step 3: Cross multiply
    200,052.20x = 300,078.30 × 121,320.20
  4. Step 4: Simplify right side
    200,052.20x = 36,405,559,371.66
  5. Step 5: Solve for x
    x = 36,405,559,371.66/200,052.20
  6. Step 6: Final answer
    x = 181,980.30

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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.