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Finding the Fourth Proportional to 235,848.92, 325,478.45 and 128,423.48

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Solution

The fourth proportional to 235,848.92, 325,478.45 and 128,423.48 is: 177,228.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,848.92 : 325,478.45 = 128,423.48 : x
  2. Step 2: Convert to fraction form
    235,848.92/325,478.45 = 128,423.48/x
  3. Step 3: Cross multiply
    235,848.92x = 325,478.45 × 128,423.48
  4. Step 4: Simplify right side
    235,848.92x = 41,799,073,907.67
  5. Step 5: Solve for x
    x = 41,799,073,907.67/235,848.92
  6. Step 6: Final answer
    x = 177,228.18

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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.