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Finding the Fourth Proportional to 235,390.86, 353,293.31 and 128,873.03

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Solution

The fourth proportional to 235,390.86, 353,293.31 and 128,873.03 is: 193,422.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,390.86 : 353,293.31 = 128,873.03 : x
  2. Step 2: Convert to fraction form
    235,390.86/353,293.31 = 128,873.03/x
  3. Step 3: Cross multiply
    235,390.86x = 353,293.31 × 128,873.03
  4. Step 4: Simplify right side
    235,390.86x = 45,529,977,894.15
  5. Step 5: Solve for x
    x = 45,529,977,894.15/235,390.86
  6. Step 6: Final answer
    x = 193,422.88

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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.