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Finding the Fourth Proportional to 66,659.60, 100,054.20 and 40,415.60

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Solution

The fourth proportional to 66,659.60, 100,054.20 and 40,415.60 is: 60,662.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,659.60 : 100,054.20 = 40,415.60 : x
  2. Step 2: Convert to fraction form
    66,659.60/100,054.20 = 40,415.60/x
  3. Step 3: Cross multiply
    66,659.60x = 100,054.20 × 40,415.60
  4. Step 4: Simplify right side
    66,659.60x = 4,043,750,525.52
  5. Step 5: Solve for x
    x = 4,043,750,525.52/66,659.60
  6. Step 6: Final answer
    x = 60,662.69

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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.