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Finding the Fourth Proportional to 75,419.40, 112,910.40 and 73,232.40

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Solution

The fourth proportional to 75,419.40, 112,910.40 and 73,232.40 is: 109,636.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,419.40 : 112,910.40 = 73,232.40 : x
  2. Step 2: Convert to fraction form
    75,419.40/112,910.40 = 73,232.40/x
  3. Step 3: Cross multiply
    75,419.40x = 112,910.40 × 73,232.40
  4. Step 4: Simplify right side
    75,419.40x = 8,268,699,576.96
  5. Step 5: Solve for x
    x = 8,268,699,576.96/75,419.40
  6. Step 6: Final answer
    x = 109,636.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.