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Finding the Fourth Proportional to 74,745.01, 111,990.63 and 45,100.55

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Solution

The fourth proportional to 74,745.01, 111,990.63 and 45,100.55 is: 67,574.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,745.01 : 111,990.63 = 45,100.55 : x
  2. Step 2: Convert to fraction form
    74,745.01/111,990.63 = 45,100.55/x
  3. Step 3: Cross multiply
    74,745.01x = 111,990.63 × 45,100.55
  4. Step 4: Simplify right side
    74,745.01x = 5,050,839,007.85
  5. Step 5: Solve for x
    x = 5,050,839,007.85/74,745.01
  6. Step 6: Final answer
    x = 67,574.27

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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.