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Finding the Fourth Proportional to 236,279.12, 326,073 and 128,858

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Solution

The fourth proportional to 236,279.12, 326,073 and 128,858 is: 177,828.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,279.12 : 326,073 = 128,858 : x
  2. Step 2: Convert to fraction form
    236,279.12/326,073 = 128,858/x
  3. Step 3: Cross multiply
    236,279.12x = 326,073 × 128,858
  4. Step 4: Simplify right side
    236,279.12x = 42,017,114,634
  5. Step 5: Solve for x
    x = 42,017,114,634/236,279.12
  6. Step 6: Final answer
    x = 177,828.30

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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.