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Finding the Fourth Proportional to 108,991.80, 163,487.70 and 80,998.20

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Solution

The fourth proportional to 108,991.80, 163,487.70 and 80,998.20 is: 121,497.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,991.80 : 163,487.70 = 80,998.20 : x
  2. Step 2: Convert to fraction form
    108,991.80/163,487.70 = 80,998.20/x
  3. Step 3: Cross multiply
    108,991.80x = 163,487.70 × 80,998.20
  4. Step 4: Simplify right side
    108,991.80x = 13,242,209,422.14
  5. Step 5: Solve for x
    x = 13,242,209,422.14/108,991.80
  6. Step 6: Final answer
    x = 121,497.30

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1.5x scale

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.