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Finding the Fourth Proportional to 66,739.80, 100,109.70 and 41,856.60

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Solution

The fourth proportional to 66,739.80, 100,109.70 and 41,856.60 is: 62,784.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,739.80 : 100,109.70 = 41,856.60 : x
  2. Step 2: Convert to fraction form
    66,739.80/100,109.70 = 41,856.60/x
  3. Step 3: Cross multiply
    66,739.80x = 100,109.70 × 41,856.60
  4. Step 4: Simplify right side
    66,739.80x = 4,190,251,669.02
  5. Step 5: Solve for x
    x = 4,190,251,669.02/66,739.80
  6. Step 6: Final answer
    x = 62,784.90

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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.