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Finding the Fourth Proportional to 108,839.20, 163,129.20 and 45,659.20

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Solution

The fourth proportional to 108,839.20, 163,129.20 and 45,659.20 is: 68,434.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,839.20 : 163,129.20 = 45,659.20 : x
  2. Step 2: Convert to fraction form
    108,839.20/163,129.20 = 45,659.20/x
  3. Step 3: Cross multiply
    108,839.20x = 163,129.20 × 45,659.20
  4. Step 4: Simplify right side
    108,839.20x = 7,448,348,768.64
  5. Step 5: Solve for x
    x = 7,448,348,768.64/108,839.20
  6. Step 6: Final answer
    x = 68,434.43

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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.