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Finding the Fourth Proportional to 200,211.84, 300,108.54 and 66,982.50

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Solution

The fourth proportional to 200,211.84, 300,108.54 and 66,982.50 is: 100,403.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,211.84 : 300,108.54 = 66,982.50 : x
  2. Step 2: Convert to fraction form
    200,211.84/300,108.54 = 66,982.50/x
  3. Step 3: Cross multiply
    200,211.84x = 300,108.54 × 66,982.50
  4. Step 4: Simplify right side
    200,211.84x = 20,102,020,280.55
  5. Step 5: Solve for x
    x = 20,102,020,280.55/200,211.84
  6. Step 6: Final answer
    x = 100,403.75

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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.