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Finding the Fourth Proportional to 236,419.80, 354,662.10 and 78,631.80

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Solution

The fourth proportional to 236,419.80, 354,662.10 and 78,631.80 is: 117,958.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,419.80 : 354,662.10 = 78,631.80 : x
  2. Step 2: Convert to fraction form
    236,419.80/354,662.10 = 78,631.80/x
  3. Step 3: Cross multiply
    236,419.80x = 354,662.10 × 78,631.80
  4. Step 4: Simplify right side
    236,419.80x = 27,887,719,314.78
  5. Step 5: Solve for x
    x = 27,887,719,314.78/236,419.80
  6. Step 6: Final answer
    x = 117,958.48

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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.