Home / 81,429.55-122,114.30-28,107.95

Finding the Fourth Proportional to 81,429.55, 122,114.30 and 28,107.95

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Solution

The fourth proportional to 81,429.55, 122,114.30 and 28,107.95 is: 42,151.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,429.55 : 122,114.30 = 28,107.95 : x
  2. Step 2: Convert to fraction form
    81,429.55/122,114.30 = 28,107.95/x
  3. Step 3: Cross multiply
    81,429.55x = 122,114.30 × 28,107.95
  4. Step 4: Simplify right side
    81,429.55x = 3,432,382,991.21
  5. Step 5: Solve for x
    x = 3,432,382,991.21/81,429.55
  6. Step 6: Final answer
    x = 42,151.57

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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.