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Finding the Fourth Proportional to 214,980.40, 322,240.20 and 81,809.20

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Solution

The fourth proportional to 214,980.40, 322,240.20 and 81,809.20 is: 122,626.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,980.40 : 322,240.20 = 81,809.20 : x
  2. Step 2: Convert to fraction form
    214,980.40/322,240.20 = 81,809.20/x
  3. Step 3: Cross multiply
    214,980.40x = 322,240.20 × 81,809.20
  4. Step 4: Simplify right side
    214,980.40x = 26,362,212,969.84
  5. Step 5: Solve for x
    x = 26,362,212,969.84/214,980.40
  6. Step 6: Final answer
    x = 122,626.12

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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.