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Finding the Fourth Proportional to 199,513.50, 299,326.50 and 81,269.70

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Solution

The fourth proportional to 199,513.50, 299,326.50 and 81,269.70 is: 121,927.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,513.50 : 299,326.50 = 81,269.70 : x
  2. Step 2: Convert to fraction form
    199,513.50/299,326.50 = 81,269.70/x
  3. Step 3: Cross multiply
    199,513.50x = 299,326.50 × 81,269.70
  4. Step 4: Simplify right side
    199,513.50x = 24,326,174,857.05
  5. Step 5: Solve for x
    x = 24,326,174,857.05/199,513.50
  6. Step 6: Final answer
    x = 121,927.46

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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.