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Finding the Fourth Proportional to 73,138.67, 100,931.34 and 39,604.67

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Solution

The fourth proportional to 73,138.67, 100,931.34 and 39,604.67 is: 54,654.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,138.67 : 100,931.34 = 39,604.67 : x
  2. Step 2: Convert to fraction form
    73,138.67/100,931.34 = 39,604.67/x
  3. Step 3: Cross multiply
    73,138.67x = 100,931.34 × 39,604.67
  4. Step 4: Simplify right side
    73,138.67x = 3,997,352,413.36
  5. Step 5: Solve for x
    x = 3,997,352,413.36/73,138.67
  6. Step 6: Final answer
    x = 54,654.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.