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Finding the Fourth Proportional to 259,886.24, 389,844.40 and 72,912.48

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Solution

The fourth proportional to 259,886.24, 389,844.40 and 72,912.48 is: 109,372.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,886.24 : 389,844.40 = 72,912.48 : x
  2. Step 2: Convert to fraction form
    259,886.24/389,844.40 = 72,912.48/x
  3. Step 3: Cross multiply
    259,886.24x = 389,844.40 × 72,912.48
  4. Step 4: Simplify right side
    259,886.24x = 28,424,522,018.11
  5. Step 5: Solve for x
    x = 28,424,522,018.11/259,886.24
  6. Step 6: Final answer
    x = 109,372.94

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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.