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Finding the Fourth Proportional to 108,694.80, 163,042.20 and 66,704.40

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Solution

The fourth proportional to 108,694.80, 163,042.20 and 66,704.40 is: 100,056.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,694.80 : 163,042.20 = 66,704.40 : x
  2. Step 2: Convert to fraction form
    108,694.80/163,042.20 = 66,704.40/x
  3. Step 3: Cross multiply
    108,694.80x = 163,042.20 × 66,704.40
  4. Step 4: Simplify right side
    108,694.80x = 10,875,632,125.68
  5. Step 5: Solve for x
    x = 10,875,632,125.68/108,694.80
  6. Step 6: Final answer
    x = 100,056.60

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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.