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Finding the Fourth Proportional to 108,408.92, 162,642.66 and 45,208.12

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Solution

The fourth proportional to 108,408.92, 162,642.66 and 45,208.12 is: 67,824.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,408.92 : 162,642.66 = 45,208.12 : x
  2. Step 2: Convert to fraction form
    108,408.92/162,642.66 = 45,208.12/x
  3. Step 3: Cross multiply
    108,408.92x = 162,642.66 × 45,208.12
  4. Step 4: Simplify right side
    108,408.92x = 7,352,768,890.40
  5. Step 5: Solve for x
    x = 7,352,768,890.40/108,408.92
  6. Step 6: Final answer
    x = 67,824.39

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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.