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Finding the Fourth Proportional to 158,634.70, 218,911.94 and 90,647.36

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Solution

The fourth proportional to 158,634.70, 218,911.94 and 90,647.36 is: 125,091.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,634.70 : 218,911.94 = 90,647.36 : x
  2. Step 2: Convert to fraction form
    158,634.70/218,911.94 = 90,647.36/x
  3. Step 3: Cross multiply
    158,634.70x = 218,911.94 × 90,647.36
  4. Step 4: Simplify right side
    158,634.70x = 19,843,789,433.48
  5. Step 5: Solve for x
    x = 19,843,789,433.48/158,634.70
  6. Step 6: Final answer
    x = 125,091.10

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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.