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Finding the Fourth Proportional to 199,999.22, 299,999.11 and 81,670.55

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Solution

The fourth proportional to 199,999.22, 299,999.11 and 81,670.55 is: 122,505.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,999.22 : 299,999.11 = 81,670.55 : x
  2. Step 2: Convert to fraction form
    199,999.22/299,999.11 = 81,670.55/x
  3. Step 3: Cross multiply
    199,999.22x = 299,999.11 × 81,670.55
  4. Step 4: Simplify right side
    199,999.22x = 24,501,092,859.03
  5. Step 5: Solve for x
    x = 24,501,092,859.03/199,999.22
  6. Step 6: Final answer
    x = 122,505.95

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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.