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Finding the Fourth Proportional to 200,403.20, 300,021.60 and 121,476.80

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Solution

The fourth proportional to 200,403.20, 300,021.60 and 121,476.80 is: 181,861.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,403.20 : 300,021.60 = 121,476.80 : x
  2. Step 2: Convert to fraction form
    200,403.20/300,021.60 = 121,476.80/x
  3. Step 3: Cross multiply
    200,403.20x = 300,021.60 × 121,476.80
  4. Step 4: Simplify right side
    200,403.20x = 36,445,663,898.88
  5. Step 5: Solve for x
    x = 36,445,663,898.88/200,403.20
  6. Step 6: Final answer
    x = 181,861.69

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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.