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Finding the Fourth Proportional to 198,645.21, 297,893.49 and 72,248.58

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Solution

The fourth proportional to 198,645.21, 297,893.49 and 72,248.58 is: 108,345.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,645.21 : 297,893.49 = 72,248.58 : x
  2. Step 2: Convert to fraction form
    198,645.21/297,893.49 = 72,248.58/x
  3. Step 3: Cross multiply
    198,645.21x = 297,893.49 × 72,248.58
  4. Step 4: Simplify right side
    198,645.21x = 21,522,381,643.74
  5. Step 5: Solve for x
    x = 21,522,381,643.74/198,645.21
  6. Step 6: Final answer
    x = 108,345.84

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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.