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Finding the Fourth Proportional to 75,379.50, 113,076.99 and 19,975.50

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Solution

The fourth proportional to 75,379.50, 113,076.99 and 19,975.50 is: 29,965.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,379.50 : 113,076.99 = 19,975.50 : x
  2. Step 2: Convert to fraction form
    75,379.50/113,076.99 = 19,975.50/x
  3. Step 3: Cross multiply
    75,379.50x = 113,076.99 × 19,975.50
  4. Step 4: Simplify right side
    75,379.50x = 2,258,769,413.75
  5. Step 5: Solve for x
    x = 2,258,769,413.75/75,379.50
  6. Step 6: Final answer
    x = 29,965.30

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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.