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Finding the Fourth Proportional to 103,608.44, 142,979.42 and 58,286.45

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Solution

The fourth proportional to 103,608.44, 142,979.42 and 58,286.45 is: 80,435.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,608.44 : 142,979.42 = 58,286.45 : x
  2. Step 2: Convert to fraction form
    103,608.44/142,979.42 = 58,286.45/x
  3. Step 3: Cross multiply
    103,608.44x = 142,979.42 × 58,286.45
  4. Step 4: Simplify right side
    103,608.44x = 8,333,761,808.53
  5. Step 5: Solve for x
    x = 8,333,761,808.53/103,608.44
  6. Step 6: Final answer
    x = 80,435.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.