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Finding the Fourth Proportional to 108,694.80, 163,042.20 and 74,869.20

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Solution

The fourth proportional to 108,694.80, 163,042.20 and 74,869.20 is: 112,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,694.80 : 163,042.20 = 74,869.20 : x
  2. Step 2: Convert to fraction form
    108,694.80/163,042.20 = 74,869.20/x
  3. Step 3: Cross multiply
    108,694.80x = 163,042.20 × 74,869.20
  4. Step 4: Simplify right side
    108,694.80x = 12,206,839,080.24
  5. Step 5: Solve for x
    x = 12,206,839,080.24/108,694.80
  6. Step 6: Final answer
    x = 112,303.80

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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.