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Finding the Fourth Proportional to 199,930.20, 300,065.40 and 81,686.40

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Solution

The fourth proportional to 199,930.20, 300,065.40 and 81,686.40 is: 122,599.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,930.20 : 300,065.40 = 81,686.40 : x
  2. Step 2: Convert to fraction form
    199,930.20/300,065.40 = 81,686.40/x
  3. Step 3: Cross multiply
    199,930.20x = 300,065.40 × 81,686.40
  4. Step 4: Simplify right side
    199,930.20x = 24,511,262,290.56
  5. Step 5: Solve for x
    x = 24,511,262,290.56/199,930.20
  6. Step 6: Final answer
    x = 122,599.10

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1.5x scale

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.