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Finding the Fourth Proportional to 66,739.15, 100,105.60 and 19,352.80

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Solution

The fourth proportional to 66,739.15, 100,105.60 and 19,352.80 is: 29,028.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,739.15 : 100,105.60 = 19,352.80 : x
  2. Step 2: Convert to fraction form
    66,739.15/100,105.60 = 19,352.80/x
  3. Step 3: Cross multiply
    66,739.15x = 100,105.60 × 19,352.80
  4. Step 4: Simplify right side
    66,739.15x = 1,937,323,558.92
  5. Step 5: Solve for x
    x = 1,937,323,558.92/66,739.15
  6. Step 6: Final answer
    x = 29,028.29

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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.