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Finding the Fourth Proportional to 108,842.80, 163,091.40 and 80,849.20

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Solution

The fourth proportional to 108,842.80, 163,091.40 and 80,849.20 is: 121,145.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,842.80 : 163,091.40 = 80,849.20 : x
  2. Step 2: Convert to fraction form
    108,842.80/163,091.40 = 80,849.20/x
  3. Step 3: Cross multiply
    108,842.80x = 163,091.40 × 80,849.20
  4. Step 4: Simplify right side
    108,842.80x = 13,185,809,216.88
  5. Step 5: Solve for x
    x = 13,185,809,216.88/108,842.80
  6. Step 6: Final answer
    x = 121,145.44

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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.