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Finding the Fourth Proportional to 259,142.48, 388,772.76 and 81,648.56

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Solution

The fourth proportional to 259,142.48, 388,772.76 and 81,648.56 is: 122,491.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,142.48 : 388,772.76 = 81,648.56 : x
  2. Step 2: Convert to fraction form
    259,142.48/388,772.76 = 81,648.56/x
  3. Step 3: Cross multiply
    259,142.48x = 388,772.76 × 81,648.56
  4. Step 4: Simplify right side
    259,142.48x = 31,742,736,021.23
  5. Step 5: Solve for x
    x = 31,742,736,021.23/259,142.48
  6. Step 6: Final answer
    x = 122,491.44

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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.