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Finding the Fourth Proportional to 74,388.85, 111,336.42 and 67,740.67

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Solution

The fourth proportional to 74,388.85, 111,336.42 and 67,740.67 is: 101,386.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,388.85 : 111,336.42 = 67,740.67 : x
  2. Step 2: Convert to fraction form
    74,388.85/111,336.42 = 67,740.67/x
  3. Step 3: Cross multiply
    74,388.85x = 111,336.42 × 67,740.67
  4. Step 4: Simplify right side
    74,388.85x = 7,542,004,079.40
  5. Step 5: Solve for x
    x = 7,542,004,079.40/74,388.85
  6. Step 6: Final answer
    x = 101,386.22

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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.