Home / 81,629.32-122,435.34-26,221

Finding the Fourth Proportional to 81,629.32, 122,435.34 and 26,221

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Solution

The fourth proportional to 81,629.32, 122,435.34 and 26,221 is: 39,328.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,629.32 : 122,435.34 = 26,221 : x
  2. Step 2: Convert to fraction form
    81,629.32/122,435.34 = 26,221/x
  3. Step 3: Cross multiply
    81,629.32x = 122,435.34 × 26,221
  4. Step 4: Simplify right side
    81,629.32x = 3,210,377,050.14
  5. Step 5: Solve for x
    x = 3,210,377,050.14/81,629.32
  6. Step 6: Final answer
    x = 39,328.72

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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.