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Finding the Fourth Proportional to 198,888.69, 298,240.53 and 72,440.90

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Solution

The fourth proportional to 198,888.69, 298,240.53 and 72,440.90 is: 108,627.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,888.69 : 298,240.53 = 72,440.90 : x
  2. Step 2: Convert to fraction form
    198,888.69/298,240.53 = 72,440.90/x
  3. Step 3: Cross multiply
    198,888.69x = 298,240.53 × 72,440.90
  4. Step 4: Simplify right side
    198,888.69x = 21,604,813,336.38
  5. Step 5: Solve for x
    x = 21,604,813,336.38/198,888.69
  6. Step 6: Final answer
    x = 108,627.66

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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.