Home / 81,621.21-122,358-29,018.39

Finding the Fourth Proportional to 81,621.21, 122,358 and 29,018.39

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Solution

The fourth proportional to 81,621.21, 122,358 and 29,018.39 is: 43,501.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,621.21 : 122,358 = 29,018.39 : x
  2. Step 2: Convert to fraction form
    81,621.21/122,358 = 29,018.39/x
  3. Step 3: Cross multiply
    81,621.21x = 122,358 × 29,018.39
  4. Step 4: Simplify right side
    81,621.21x = 3,550,631,551.83
  5. Step 5: Solve for x
    x = 3,550,631,551.83/81,621.21
  6. Step 6: Final answer
    x = 43,501.33

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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.