Home / 74,491.20-111,736.80-66,974.40

Finding the Fourth Proportional to 74,491.20, 111,736.80 and 66,974.40

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Solution

The fourth proportional to 74,491.20, 111,736.80 and 66,974.40 is: 100,461.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,491.20 : 111,736.80 = 66,974.40 : x
  2. Step 2: Convert to fraction form
    74,491.20/111,736.80 = 66,974.40/x
  3. Step 3: Cross multiply
    74,491.20x = 111,736.80 × 66,974.40
  4. Step 4: Simplify right side
    74,491.20x = 7,483,505,137.92
  5. Step 5: Solve for x
    x = 7,483,505,137.92/74,491.20
  6. Step 6: Final answer
    x = 100,461.60

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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.