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Finding the Fourth Proportional to 108,695.80, 163,043.70 and 104,759.20

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Solution

The fourth proportional to 108,695.80, 163,043.70 and 104,759.20 is: 157,138.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,695.80 : 163,043.70 = 104,759.20 : x
  2. Step 2: Convert to fraction form
    108,695.80/163,043.70 = 104,759.20/x
  3. Step 3: Cross multiply
    108,695.80x = 163,043.70 × 104,759.20
  4. Step 4: Simplify right side
    108,695.80x = 17,080,327,577.04
  5. Step 5: Solve for x
    x = 17,080,327,577.04/108,695.80
  6. Step 6: Final answer
    x = 157,138.80

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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.