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Finding the Fourth Proportional to 108,086.40, 161,914.68 and 84,602.88

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Solution

The fourth proportional to 108,086.40, 161,914.68 and 84,602.88 is: 126,736.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,086.40 : 161,914.68 = 84,602.88 : x
  2. Step 2: Convert to fraction form
    108,086.40/161,914.68 = 84,602.88/x
  3. Step 3: Cross multiply
    108,086.40x = 161,914.68 × 84,602.88
  4. Step 4: Simplify right side
    108,086.40x = 13,698,448,242.28
  5. Step 5: Solve for x
    x = 13,698,448,242.28/108,086.40
  6. Step 6: Final answer
    x = 126,736.09

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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.