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Finding the Fourth Proportional to 208,858.76, 313,320.78 and 68,585.48

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Solution

The fourth proportional to 208,858.76, 313,320.78 and 68,585.48 is: 102,888.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,858.76 : 313,320.78 = 68,585.48 : x
  2. Step 2: Convert to fraction form
    208,858.76/313,320.78 = 68,585.48/x
  3. Step 3: Cross multiply
    208,858.76x = 313,320.78 × 68,585.48
  4. Step 4: Simplify right side
    208,858.76x = 21,489,256,090.27
  5. Step 5: Solve for x
    x = 21,489,256,090.27/208,858.76
  6. Step 6: Final answer
    x = 102,888.94

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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.