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Finding the Fourth Proportional to 74,804.70, 103,759.32 and 72,111.44

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Solution

The fourth proportional to 74,804.70, 103,759.32 and 72,111.44 is: 100,023.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,804.70 : 103,759.32 = 72,111.44 : x
  2. Step 2: Convert to fraction form
    74,804.70/103,759.32 = 72,111.44/x
  3. Step 3: Cross multiply
    74,804.70x = 103,759.32 × 72,111.44
  4. Step 4: Simplify right side
    74,804.70x = 7,482,233,978.62
  5. Step 5: Solve for x
    x = 7,482,233,978.62/74,804.70
  6. Step 6: Final answer
    x = 100,023.58

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.