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Finding the Fourth Proportional to 108,220, 162,187.44 and 45,813.28

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Solution

The fourth proportional to 108,220, 162,187.44 and 45,813.28 is: 68,659.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,220 : 162,187.44 = 45,813.28 : x
  2. Step 2: Convert to fraction form
    108,220/162,187.44 = 45,813.28/x
  3. Step 3: Cross multiply
    108,220x = 162,187.44 × 45,813.28
  4. Step 4: Simplify right side
    108,220x = 7,430,338,601.20
  5. Step 5: Solve for x
    x = 7,430,338,601.20/108,220
  6. Step 6: Final answer
    x = 68,659.57

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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.