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Finding the Fourth Proportional to 66,777.70, 100,129.11 and 45,741.49

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Solution

The fourth proportional to 66,777.70, 100,129.11 and 45,741.49 is: 68,586.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,777.70 : 100,129.11 = 45,741.49 : x
  2. Step 2: Convert to fraction form
    66,777.70/100,129.11 = 45,741.49/x
  3. Step 3: Cross multiply
    66,777.70x = 100,129.11 × 45,741.49
  4. Step 4: Simplify right side
    66,777.70x = 4,580,054,683.77
  5. Step 5: Solve for x
    x = 4,580,054,683.77/66,777.70
  6. Step 6: Final answer
    x = 68,586.59

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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.