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Finding the Fourth Proportional to 193,715.90, 290,469.85 and 69,040.70

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Solution

The fourth proportional to 193,715.90, 290,469.85 and 69,040.70 is: 103,523.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,715.90 : 290,469.85 = 69,040.70 : x
  2. Step 2: Convert to fraction form
    193,715.90/290,469.85 = 69,040.70/x
  3. Step 3: Cross multiply
    193,715.90x = 290,469.85 × 69,040.70
  4. Step 4: Simplify right side
    193,715.90x = 20,054,241,772.90
  5. Step 5: Solve for x
    x = 20,054,241,772.90/193,715.90
  6. Step 6: Final answer
    x = 103,523.98

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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.