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Finding the Fourth Proportional to 72,719.88, 100,351.44 and 40,887.96

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Solution

The fourth proportional to 72,719.88, 100,351.44 and 40,887.96 is: 56,424.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,719.88 : 100,351.44 = 40,887.96 : x
  2. Step 2: Convert to fraction form
    72,719.88/100,351.44 = 40,887.96/x
  3. Step 3: Cross multiply
    72,719.88x = 100,351.44 × 40,887.96
  4. Step 4: Simplify right side
    72,719.88x = 4,103,165,664.66
  5. Step 5: Solve for x
    x = 4,103,165,664.66/72,719.88
  6. Step 6: Final answer
    x = 56,424.26

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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.