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Finding the Fourth Proportional to 200,052.70, 300,079.05 and 121,320.70

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Solution

The fourth proportional to 200,052.70, 300,079.05 and 121,320.70 is: 181,981.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,052.70 : 300,079.05 = 121,320.70 : x
  2. Step 2: Convert to fraction form
    200,052.70/300,079.05 = 121,320.70/x
  3. Step 3: Cross multiply
    200,052.70x = 300,079.05 × 121,320.70
  4. Step 4: Simplify right side
    200,052.70x = 36,405,800,401.34
  5. Step 5: Solve for x
    x = 36,405,800,401.34/200,052.70
  6. Step 6: Final answer
    x = 181,981.05

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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.