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Finding the Fourth Proportional to 208,313.48, 312,486.43 and 68,086.28

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Solution

The fourth proportional to 208,313.48, 312,486.43 and 68,086.28 is: 102,134.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,313.48 : 312,486.43 = 68,086.28 : x
  2. Step 2: Convert to fraction form
    208,313.48/312,486.43 = 68,086.28/x
  3. Step 3: Cross multiply
    208,313.48x = 312,486.43 × 68,086.28
  4. Step 4: Simplify right side
    208,313.48x = 21,276,039,180.18
  5. Step 5: Solve for x
    x = 21,276,039,180.18/208,313.48
  6. Step 6: Final answer
    x = 102,134.72

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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.