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Finding the Fourth Proportional to 198,780.99, 298,173.12 and 72,511.71

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Solution

The fourth proportional to 198,780.99, 298,173.12 and 72,511.71 is: 108,768.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,780.99 : 298,173.12 = 72,511.71 : x
  2. Step 2: Convert to fraction form
    198,780.99/298,173.12 = 72,511.71/x
  3. Step 3: Cross multiply
    198,780.99x = 298,173.12 × 72,511.71
  4. Step 4: Simplify right side
    198,780.99x = 21,621,042,807.24
  5. Step 5: Solve for x
    x = 21,621,042,807.24/198,780.99
  6. Step 6: Final answer
    x = 108,768.16

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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.