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Finding the Fourth Proportional to 199,661,379.20, 299,492,068.80 and 133,904,412.80

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Solution

The fourth proportional to 199,661,379.20, 299,492,068.80 and 133,904,412.80 is: 200,856,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,661,379.20 : 299,492,068.80 = 133,904,412.80 : x
  2. Step 2: Convert to fraction form
    199,661,379.20/299,492,068.80 = 133,904,412.80/x
  3. Step 3: Cross multiply
    199,661,379.20x = 299,492,068.80 × 133,904,412.80
  4. Step 4: Simplify right side
    199,661,379.20x = 40,103,309,610,921,200
  5. Step 5: Solve for x
    x = 40,103,309,610,921,200/199,661,379.20
  6. Step 6: Final answer
    x = 200,856,619.20

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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.