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Finding the Fourth Proportional to 199,609.90, 299,499.90 and 104,912.80

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Solution

The fourth proportional to 199,609.90, 299,499.90 and 104,912.80 is: 157,413.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,609.90 : 299,499.90 = 104,912.80 : x
  2. Step 2: Convert to fraction form
    199,609.90/299,499.90 = 104,912.80/x
  3. Step 3: Cross multiply
    199,609.90x = 299,499.90 × 104,912.80
  4. Step 4: Simplify right side
    199,609.90x = 31,421,373,108.72
  5. Step 5: Solve for x
    x = 31,421,373,108.72/199,609.90
  6. Step 6: Final answer
    x = 157,413.90

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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.