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Finding the Fourth Proportional to 111,790.80, 167,556.60 and 45,187.20

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Solution

The fourth proportional to 111,790.80, 167,556.60 and 45,187.20 is: 67,728.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,790.80 : 167,556.60 = 45,187.20 : x
  2. Step 2: Convert to fraction form
    111,790.80/167,556.60 = 45,187.20/x
  3. Step 3: Cross multiply
    111,790.80x = 167,556.60 × 45,187.20
  4. Step 4: Simplify right side
    111,790.80x = 7,571,413,595.52
  5. Step 5: Solve for x
    x = 7,571,413,595.52/111,790.80
  6. Step 6: Final answer
    x = 67,728.41

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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.