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Finding the Fourth Proportional to 199,706,670.80, 299,587,999.80 and 78,509,934.80

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Solution

The fourth proportional to 199,706,670.80, 299,587,999.80 and 78,509,934.80 is: 117,775,907.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,706,670.80 : 299,587,999.80 = 78,509,934.80 : x
  2. Step 2: Convert to fraction form
    199,706,670.80/299,587,999.80 = 78,509,934.80/x
  3. Step 3: Cross multiply
    199,706,670.80x = 299,587,999.80 × 78,509,934.80
  4. Step 4: Simplify right side
    199,706,670.80x = 23,520,634,331,160,412
  5. Step 5: Solve for x
    x = 23,520,634,331,160,412/199,706,670.80
  6. Step 6: Final answer
    x = 117,775,907.22

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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.