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Finding the Fourth Proportional to 108,965.28, 163,229.20 and 79,445.64

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Solution

The fourth proportional to 108,965.28, 163,229.20 and 79,445.64 is: 119,008.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,965.28 : 163,229.20 = 79,445.64 : x
  2. Step 2: Convert to fraction form
    108,965.28/163,229.20 = 79,445.64/x
  3. Step 3: Cross multiply
    108,965.28x = 163,229.20 × 79,445.64
  4. Step 4: Simplify right side
    108,965.28x = 12,967,848,260.69
  5. Step 5: Solve for x
    x = 12,967,848,260.69/108,965.28
  6. Step 6: Final answer
    x = 119,008.99

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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.