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Finding the Fourth Proportional to 103,640.52, 155,460.76 and 68,571.96

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Solution

The fourth proportional to 103,640.52, 155,460.76 and 68,571.96 is: 102,857.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.52 : 155,460.76 = 68,571.96 : x
  2. Step 2: Convert to fraction form
    103,640.52/155,460.76 = 68,571.96/x
  3. Step 3: Cross multiply
    103,640.52x = 155,460.76 × 68,571.96
  4. Step 4: Simplify right side
    103,640.52x = 10,660,249,016.29
  5. Step 5: Solve for x
    x = 10,660,249,016.29/103,640.52
  6. Step 6: Final answer
    x = 102,857.93

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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.