Home / 43,140.72-64,665-30,791.28

Finding the Fourth Proportional to 43,140.72, 64,665 and 30,791.28

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Solution

The fourth proportional to 43,140.72, 64,665 and 30,791.28 is: 46,154.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,140.72 : 64,665 = 30,791.28 : x
  2. Step 2: Convert to fraction form
    43,140.72/64,665 = 30,791.28/x
  3. Step 3: Cross multiply
    43,140.72x = 64,665 × 30,791.28
  4. Step 4: Simplify right side
    43,140.72x = 1,991,118,121.20
  5. Step 5: Solve for x
    x = 1,991,118,121.20/43,140.72
  6. Step 6: Final answer
    x = 46,154.03

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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.