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Finding the Fourth Proportional to 199,815.30, 299,759.40 and 81,498.60

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Solution

The fourth proportional to 199,815.30, 299,759.40 and 81,498.60 is: 122,262.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,815.30 : 299,759.40 = 81,498.60 : x
  2. Step 2: Convert to fraction form
    199,815.30/299,759.40 = 81,498.60/x
  3. Step 3: Cross multiply
    199,815.30x = 299,759.40 × 81,498.60
  4. Step 4: Simplify right side
    199,815.30x = 24,429,971,436.84
  5. Step 5: Solve for x
    x = 24,429,971,436.84/199,815.30
  6. Step 6: Final answer
    x = 122,262.77

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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.