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Finding the Fourth Proportional to 128,548.87, 192,791.83 and 53,669.63

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Solution

The fourth proportional to 128,548.87, 192,791.83 and 53,669.63 is: 80,491.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,548.87 : 192,791.83 = 53,669.63 : x
  2. Step 2: Convert to fraction form
    128,548.87/192,791.83 = 53,669.63/x
  3. Step 3: Cross multiply
    128,548.87x = 192,791.83 × 53,669.63
  4. Step 4: Simplify right side
    128,548.87x = 10,347,066,183.12
  5. Step 5: Solve for x
    x = 10,347,066,183.12/128,548.87
  6. Step 6: Final answer
    x = 80,491.30

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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.