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Finding the Fourth Proportional to 235,628.76, 325,161.90 and 128,199

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Solution

The fourth proportional to 235,628.76, 325,161.90 and 128,199 is: 176,911.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,628.76 : 325,161.90 = 128,199 : x
  2. Step 2: Convert to fraction form
    235,628.76/325,161.90 = 128,199/x
  3. Step 3: Cross multiply
    235,628.76x = 325,161.90 × 128,199
  4. Step 4: Simplify right side
    235,628.76x = 41,685,430,418.10
  5. Step 5: Solve for x
    x = 41,685,430,418.10/235,628.76
  6. Step 6: Final answer
    x = 176,911.47

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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.