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Finding the Fourth Proportional to 74,600.40, 111,900.60 and 30,228.60

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Solution

The fourth proportional to 74,600.40, 111,900.60 and 30,228.60 is: 45,342.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,600.40 : 111,900.60 = 30,228.60 : x
  2. Step 2: Convert to fraction form
    74,600.40/111,900.60 = 30,228.60/x
  3. Step 3: Cross multiply
    74,600.40x = 111,900.60 × 30,228.60
  4. Step 4: Simplify right side
    74,600.40x = 3,382,598,477.16
  5. Step 5: Solve for x
    x = 3,382,598,477.16/74,600.40
  6. Step 6: Final answer
    x = 45,342.90

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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.