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Finding the Fourth Proportional to 73,412.20, 110,118.30 and 66,845.80

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Solution

The fourth proportional to 73,412.20, 110,118.30 and 66,845.80 is: 100,268.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,412.20 : 110,118.30 = 66,845.80 : x
  2. Step 2: Convert to fraction form
    73,412.20/110,118.30 = 66,845.80/x
  3. Step 3: Cross multiply
    73,412.20x = 110,118.30 × 66,845.80
  4. Step 4: Simplify right side
    73,412.20x = 7,360,945,858.14
  5. Step 5: Solve for x
    x = 7,360,945,858.14/73,412.20
  6. Step 6: Final answer
    x = 100,268.70

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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.