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Finding the Fourth Proportional to 213,279.30, 294,342.84 and 122,664.60

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Solution

The fourth proportional to 213,279.30, 294,342.84 and 122,664.60 is: 169,287.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,279.30 : 294,342.84 = 122,664.60 : x
  2. Step 2: Convert to fraction form
    213,279.30/294,342.84 = 122,664.60/x
  3. Step 3: Cross multiply
    213,279.30x = 294,342.84 × 122,664.60
  4. Step 4: Simplify right side
    213,279.30x = 36,105,446,731.46
  5. Step 5: Solve for x
    x = 36,105,446,731.46/213,279.30
  6. Step 6: Final answer
    x = 169,287.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.