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Finding the Fourth Proportional to 74,410.28, 102,687.28 and 40,419.41

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Solution

The fourth proportional to 74,410.28, 102,687.28 and 40,419.41 is: 55,779.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,410.28 : 102,687.28 = 40,419.41 : x
  2. Step 2: Convert to fraction form
    74,410.28/102,687.28 = 40,419.41/x
  3. Step 3: Cross multiply
    74,410.28x = 102,687.28 × 40,419.41
  4. Step 4: Simplify right side
    74,410.28x = 4,150,558,657.62
  5. Step 5: Solve for x
    x = 4,150,558,657.62/74,410.28
  6. Step 6: Final answer
    x = 55,779.37

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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.