Home / 81,538.22-122,318.67-28,935.20

Finding the Fourth Proportional to 81,538.22, 122,318.67 and 28,935.20

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Solution

The fourth proportional to 81,538.22, 122,318.67 and 28,935.20 is: 43,406.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,538.22 : 122,318.67 = 28,935.20 : x
  2. Step 2: Convert to fraction form
    81,538.22/122,318.67 = 28,935.20/x
  3. Step 3: Cross multiply
    81,538.22x = 122,318.67 × 28,935.20
  4. Step 4: Simplify right side
    81,538.22x = 3,539,315,180.18
  5. Step 5: Solve for x
    x = 3,539,315,180.18/81,538.22
  6. Step 6: Final answer
    x = 43,406.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.