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Finding the Fourth Proportional to 36,700.80, 54,986.40 and 30,091.20

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Solution

The fourth proportional to 36,700.80, 54,986.40 and 30,091.20 is: 45,083.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,700.80 : 54,986.40 = 30,091.20 : x
  2. Step 2: Convert to fraction form
    36,700.80/54,986.40 = 30,091.20/x
  3. Step 3: Cross multiply
    36,700.80x = 54,986.40 × 30,091.20
  4. Step 4: Simplify right side
    36,700.80x = 1,654,606,759.68
  5. Step 5: Solve for x
    x = 1,654,606,759.68/36,700.80
  6. Step 6: Final answer
    x = 45,083.67

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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.