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Finding the Fourth Proportional to 74,640.44, 103,003.89 and 40,648.98

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Solution

The fourth proportional to 74,640.44, 103,003.89 and 40,648.98 is: 56,095.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,640.44 : 103,003.89 = 40,648.98 : x
  2. Step 2: Convert to fraction form
    74,640.44/103,003.89 = 40,648.98/x
  3. Step 3: Cross multiply
    74,640.44x = 103,003.89 × 40,648.98
  4. Step 4: Simplify right side
    74,640.44x = 4,187,003,064.53
  5. Step 5: Solve for x
    x = 4,187,003,064.53/74,640.44
  6. Step 6: Final answer
    x = 56,095.64

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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.