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Finding the Fourth Proportional to 108,743.70, 163,115.55 and 67,271.70

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Solution

The fourth proportional to 108,743.70, 163,115.55 and 67,271.70 is: 100,907.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,743.70 : 163,115.55 = 67,271.70 : x
  2. Step 2: Convert to fraction form
    108,743.70/163,115.55 = 67,271.70/x
  3. Step 3: Cross multiply
    108,743.70x = 163,115.55 × 67,271.70
  4. Step 4: Simplify right side
    108,743.70x = 10,973,060,344.94
  5. Step 5: Solve for x
    x = 10,973,060,344.94/108,743.70
  6. Step 6: Final answer
    x = 100,907.55

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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.