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Finding the Fourth Proportional to 68,606.70, 102,708.45 and 51,153.90

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Solution

The fourth proportional to 68,606.70, 102,708.45 and 51,153.90 is: 76,580.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,606.70 : 102,708.45 = 51,153.90 : x
  2. Step 2: Convert to fraction form
    68,606.70/102,708.45 = 51,153.90/x
  3. Step 3: Cross multiply
    68,606.70x = 102,708.45 × 51,153.90
  4. Step 4: Simplify right side
    68,606.70x = 5,253,937,780.46
  5. Step 5: Solve for x
    x = 5,253,937,780.46/68,606.70
  6. Step 6: Final answer
    x = 76,580.53

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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.