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Finding the Fourth Proportional to 123,251.80, 170,041.89 and 91,063.93

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Solution

The fourth proportional to 123,251.80, 170,041.89 and 91,063.93 is: 125,634.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,251.80 : 170,041.89 = 91,063.93 : x
  2. Step 2: Convert to fraction form
    123,251.80/170,041.89 = 91,063.93/x
  3. Step 3: Cross multiply
    123,251.80x = 170,041.89 × 91,063.93
  4. Step 4: Simplify right side
    123,251.80x = 15,484,682,768.03
  5. Step 5: Solve for x
    x = 15,484,682,768.03/123,251.80
  6. Step 6: Final answer
    x = 125,634.54

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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.