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Finding the Fourth Proportional to 198,394.30, 297,499.38 and 72,018.64

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Solution

The fourth proportional to 198,394.30, 297,499.38 and 72,018.64 is: 107,994.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,394.30 : 297,499.38 = 72,018.64 : x
  2. Step 2: Convert to fraction form
    198,394.30/297,499.38 = 72,018.64/x
  3. Step 3: Cross multiply
    198,394.30x = 297,499.38 × 72,018.64
  4. Step 4: Simplify right side
    198,394.30x = 21,425,500,748.44
  5. Step 5: Solve for x
    x = 21,425,500,748.44/198,394.30
  6. Step 6: Final answer
    x = 107,994.54

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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.