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Finding the Fourth Proportional to 68,606.20, 102,707.70 and 51,153.40

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Solution

The fourth proportional to 68,606.20, 102,707.70 and 51,153.40 is: 76,579.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,606.20 : 102,707.70 = 51,153.40 : x
  2. Step 2: Convert to fraction form
    68,606.20/102,707.70 = 51,153.40/x
  3. Step 3: Cross multiply
    68,606.20x = 102,707.70 × 51,153.40
  4. Step 4: Simplify right side
    68,606.20x = 5,253,848,061.18
  5. Step 5: Solve for x
    x = 5,253,848,061.18/68,606.20
  6. Step 6: Final answer
    x = 76,579.79

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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.