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Finding the Fourth Proportional to 199,718.84, 299,578.26 and 81,369.34

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Solution

The fourth proportional to 199,718.84, 299,578.26 and 81,369.34 is: 122,054.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,718.84 : 299,578.26 = 81,369.34 : x
  2. Step 2: Convert to fraction form
    199,718.84/299,578.26 = 81,369.34/x
  3. Step 3: Cross multiply
    199,718.84x = 299,578.26 × 81,369.34
  4. Step 4: Simplify right side
    199,718.84x = 24,376,485,294.55
  5. Step 5: Solve for x
    x = 24,376,485,294.55/199,718.84
  6. Step 6: Final answer
    x = 122,054.01

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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.