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Finding the Fourth Proportional to 66,782.58, 100,173.87 and 38,745.78

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Solution

The fourth proportional to 66,782.58, 100,173.87 and 38,745.78 is: 58,118.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,782.58 : 100,173.87 = 38,745.78 : x
  2. Step 2: Convert to fraction form
    66,782.58/100,173.87 = 38,745.78/x
  3. Step 3: Cross multiply
    66,782.58x = 100,173.87 × 38,745.78
  4. Step 4: Simplify right side
    66,782.58x = 3,881,314,728.77
  5. Step 5: Solve for x
    x = 3,881,314,728.77/66,782.58
  6. Step 6: Final answer
    x = 58,118.67

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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.