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Finding the Fourth Proportional to 235,783.88, 353,719.58 and 78,013.70

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Solution

The fourth proportional to 235,783.88, 353,719.58 and 78,013.70 is: 117,035.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,783.88 : 353,719.58 = 78,013.70 : x
  2. Step 2: Convert to fraction form
    235,783.88/353,719.58 = 78,013.70/x
  3. Step 3: Cross multiply
    235,783.88x = 353,719.58 × 78,013.70
  4. Step 4: Simplify right side
    235,783.88x = 27,594,972,366.03
  5. Step 5: Solve for x
    x = 27,594,972,366.03/235,783.88
  6. Step 6: Final answer
    x = 117,035.03

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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.