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Finding the Fourth Proportional to 158,620.38, 218,907.25 and 90,647.39

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Solution

The fourth proportional to 158,620.38, 218,907.25 and 90,647.39 is: 125,099.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,620.38 : 218,907.25 = 90,647.39 : x
  2. Step 2: Convert to fraction form
    158,620.38/218,907.25 = 90,647.39/x
  3. Step 3: Cross multiply
    158,620.38x = 218,907.25 × 90,647.39
  4. Step 4: Simplify right side
    158,620.38x = 19,843,371,323.54
  5. Step 5: Solve for x
    x = 19,843,371,323.54/158,620.38
  6. Step 6: Final answer
    x = 125,099.76

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1.5x scale

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.