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Finding the Fourth Proportional to 66,777.45, 100,128.73 and 45,741.25

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Solution

The fourth proportional to 66,777.45, 100,128.73 and 45,741.25 is: 68,586.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,777.45 : 100,128.73 = 45,741.25 : x
  2. Step 2: Convert to fraction form
    66,777.45/100,128.73 = 45,741.25/x
  3. Step 3: Cross multiply
    66,777.45x = 100,128.73 × 45,741.25
  4. Step 4: Simplify right side
    66,777.45x = 4,580,012,906.44
  5. Step 5: Solve for x
    x = 4,580,012,906.44/66,777.45
  6. Step 6: Final answer
    x = 68,586.22

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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.