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Finding the Fourth Proportional to 43,146, 64,625.52 and 20,912.87

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Solution

The fourth proportional to 43,146, 64,625.52 and 20,912.87 is: 31,323.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,146 : 64,625.52 = 20,912.87 : x
  2. Step 2: Convert to fraction form
    43,146/64,625.52 = 20,912.87/x
  3. Step 3: Cross multiply
    43,146x = 64,625.52 × 20,912.87
  4. Step 4: Simplify right side
    43,146x = 1,351,504,775.31
  5. Step 5: Solve for x
    x = 1,351,504,775.31/43,146
  6. Step 6: Final answer
    x = 31,323.99

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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.