Home / 72,375.12-108,729.54-69,385.80

Finding the Fourth Proportional to 72,375.12, 108,729.54 and 69,385.80

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Solution

The fourth proportional to 72,375.12, 108,729.54 and 69,385.80 is: 104,238.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,375.12 : 108,729.54 = 69,385.80 : x
  2. Step 2: Convert to fraction form
    72,375.12/108,729.54 = 69,385.80/x
  3. Step 3: Cross multiply
    72,375.12x = 108,729.54 × 69,385.80
  4. Step 4: Simplify right side
    72,375.12x = 7,544,286,116.53
  5. Step 5: Solve for x
    x = 7,544,286,116.53/72,375.12
  6. Step 6: Final answer
    x = 104,238.67

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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.