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Finding the Fourth Proportional to 68,708.43, 103,046.05 and 28,705.79

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Solution

The fourth proportional to 68,708.43, 103,046.05 and 28,705.79 is: 43,051.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,708.43 : 103,046.05 = 28,705.79 : x
  2. Step 2: Convert to fraction form
    68,708.43/103,046.05 = 28,705.79/x
  3. Step 3: Cross multiply
    68,708.43x = 103,046.05 × 28,705.79
  4. Step 4: Simplify right side
    68,708.43x = 2,958,018,484.39
  5. Step 5: Solve for x
    x = 2,958,018,484.39/68,708.43
  6. Step 6: Final answer
    x = 43,051.76

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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.