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Finding the Fourth Proportional to 74,865.69, 103,314.65 and 43,040.79

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Solution

The fourth proportional to 74,865.69, 103,314.65 and 43,040.79 is: 59,396.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,865.69 : 103,314.65 = 43,040.79 : x
  2. Step 2: Convert to fraction form
    74,865.69/103,314.65 = 43,040.79/x
  3. Step 3: Cross multiply
    74,865.69x = 103,314.65 × 43,040.79
  4. Step 4: Simplify right side
    74,865.69x = 4,446,743,939.37
  5. Step 5: Solve for x
    x = 4,446,743,939.37/74,865.69
  6. Step 6: Final answer
    x = 59,396.29

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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.