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Finding the Fourth Proportional to 158,422.05, 218,622.11 and 86,804.37

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Solution

The fourth proportional to 158,422.05, 218,622.11 and 86,804.37 is: 119,789.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,422.05 : 218,622.11 = 86,804.37 : x
  2. Step 2: Convert to fraction form
    158,422.05/218,622.11 = 86,804.37/x
  3. Step 3: Cross multiply
    158,422.05x = 218,622.11 × 86,804.37
  4. Step 4: Simplify right side
    158,422.05x = 18,977,354,092.60
  5. Step 5: Solve for x
    x = 18,977,354,092.60/158,422.05
  6. Step 6: Final answer
    x = 119,789.85

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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.