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Finding the Fourth Proportional to 200,124.72, 300,200.76 and 66,999.60

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Solution

The fourth proportional to 200,124.72, 300,200.76 and 66,999.60 is: 100,503.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,124.72 : 300,200.76 = 66,999.60 : x
  2. Step 2: Convert to fraction form
    200,124.72/300,200.76 = 66,999.60/x
  3. Step 3: Cross multiply
    200,124.72x = 300,200.76 × 66,999.60
  4. Step 4: Simplify right side
    200,124.72x = 20,113,330,839.70
  5. Step 5: Solve for x
    x = 20,113,330,839.70/200,124.72
  6. Step 6: Final answer
    x = 100,503.98

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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.