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Finding the Fourth Proportional to 235,636.47, 325,179.74 and 128,207.31

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Solution

The fourth proportional to 235,636.47, 325,179.74 and 128,207.31 is: 176,926.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,636.47 : 325,179.74 = 128,207.31 : x
  2. Step 2: Convert to fraction form
    235,636.47/325,179.74 = 128,207.31/x
  3. Step 3: Cross multiply
    235,636.47x = 325,179.74 × 128,207.31
  4. Step 4: Simplify right side
    235,636.47x = 41,690,419,090.86
  5. Step 5: Solve for x
    x = 41,690,419,090.86/235,636.47
  6. Step 6: Final answer
    x = 176,926.85

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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.