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Finding the Fourth Proportional to 235,793.20, 325,384.66 and 128,361

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Solution

The fourth proportional to 235,793.20, 325,384.66 and 128,361 is: 177,132.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,793.20 : 325,384.66 = 128,361 : x
  2. Step 2: Convert to fraction form
    235,793.20/325,384.66 = 128,361/x
  3. Step 3: Cross multiply
    235,793.20x = 325,384.66 × 128,361
  4. Step 4: Simplify right side
    235,793.20x = 41,766,700,342.26
  5. Step 5: Solve for x
    x = 41,766,700,342.26/235,793.20
  6. Step 6: Final answer
    x = 177,132.76

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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.