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Finding the Fourth Proportional to 74,764.58, 103,174.81 and 40,772.98

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Solution

The fourth proportional to 74,764.58, 103,174.81 and 40,772.98 is: 56,266.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,764.58 : 103,174.81 = 40,772.98 : x
  2. Step 2: Convert to fraction form
    74,764.58/103,174.81 = 40,772.98/x
  3. Step 3: Cross multiply
    74,764.58x = 103,174.81 × 40,772.98
  4. Step 4: Simplify right side
    74,764.58x = 4,206,744,644.57
  5. Step 5: Solve for x
    x = 4,206,744,644.57/74,764.58
  6. Step 6: Final answer
    x = 56,266.55

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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.