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Finding the Fourth Proportional to 66,910.51, 100,420.98 and 33,640.03

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Solution

The fourth proportional to 66,910.51, 100,420.98 and 33,640.03 is: 50,487.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,910.51 : 100,420.98 = 33,640.03 : x
  2. Step 2: Convert to fraction form
    66,910.51/100,420.98 = 33,640.03/x
  3. Step 3: Cross multiply
    66,910.51x = 100,420.98 × 33,640.03
  4. Step 4: Simplify right side
    66,910.51x = 3,378,164,779.83
  5. Step 5: Solve for x
    x = 3,378,164,779.83/66,910.51
  6. Step 6: Final answer
    x = 50,487.80

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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.