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Finding the Fourth Proportional to 75,216.72, 103,809.96 and 43,379.28

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Solution

The fourth proportional to 75,216.72, 103,809.96 and 43,379.28 is: 59,869.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,216.72 : 103,809.96 = 43,379.28 : x
  2. Step 2: Convert to fraction form
    75,216.72/103,809.96 = 43,379.28/x
  3. Step 3: Cross multiply
    75,216.72x = 103,809.96 × 43,379.28
  4. Step 4: Simplify right side
    75,216.72x = 4,503,201,321.63
  5. Step 5: Solve for x
    x = 4,503,201,321.63/75,216.72
  6. Step 6: Final answer
    x = 59,869.68

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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.