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Finding the Fourth Proportional to 208,980.72, 313,509.96 and 68,744.88

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Solution

The fourth proportional to 208,980.72, 313,509.96 and 68,744.88 is: 103,130.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,980.72 : 313,509.96 = 68,744.88 : x
  2. Step 2: Convert to fraction form
    208,980.72/313,509.96 = 68,744.88/x
  3. Step 3: Cross multiply
    208,980.72x = 313,509.96 × 68,744.88
  4. Step 4: Simplify right side
    208,980.72x = 21,552,204,579.00
  5. Step 5: Solve for x
    x = 21,552,204,579.00/208,980.72
  6. Step 6: Final answer
    x = 103,130.11

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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.