Home / 123,800.55-170,845.46-72,815.43

Finding the Fourth Proportional to 123,800.55, 170,845.46 and 72,815.43

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Solution

The fourth proportional to 123,800.55, 170,845.46 and 72,815.43 is: 100,485.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,800.55 : 170,845.46 = 72,815.43 : x
  2. Step 2: Convert to fraction form
    123,800.55/170,845.46 = 72,815.43/x
  3. Step 3: Cross multiply
    123,800.55x = 170,845.46 × 72,815.43
  4. Step 4: Simplify right side
    123,800.55x = 12,440,185,633.45
  5. Step 5: Solve for x
    x = 12,440,185,633.45/123,800.55
  6. Step 6: Final answer
    x = 100,485.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.