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Finding the Fourth Proportional to 74,795.70, 103,218.56 and 40,804.72

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Solution

The fourth proportional to 74,795.70, 103,218.56 and 40,804.72 is: 56,310.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,795.70 : 103,218.56 = 40,804.72 : x
  2. Step 2: Convert to fraction form
    74,795.70/103,218.56 = 40,804.72/x
  3. Step 3: Cross multiply
    74,795.70x = 103,218.56 × 40,804.72
  4. Step 4: Simplify right side
    74,795.70x = 4,211,804,235.58
  5. Step 5: Solve for x
    x = 4,211,804,235.58/74,795.70
  6. Step 6: Final answer
    x = 56,310.78

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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.