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Finding the Fourth Proportional to 158,422.14, 218,622.51 and 86,804.88

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Solution

The fourth proportional to 158,422.14, 218,622.51 and 86,804.88 is: 119,790.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,422.14 : 218,622.51 = 86,804.88 : x
  2. Step 2: Convert to fraction form
    158,422.14/218,622.51 = 86,804.88/x
  3. Step 3: Cross multiply
    158,422.14x = 218,622.51 × 86,804.88
  4. Step 4: Simplify right side
    158,422.14x = 18,977,500,745.85
  5. Step 5: Solve for x
    x = 18,977,500,745.85/158,422.14
  6. Step 6: Final answer
    x = 119,790.71

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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.