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Finding the Fourth Proportional to 113,751.20, 170,756.40 and 67,030.40

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Solution

The fourth proportional to 113,751.20, 170,756.40 and 67,030.40 is: 100,621.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,751.20 : 170,756.40 = 67,030.40 : x
  2. Step 2: Convert to fraction form
    113,751.20/170,756.40 = 67,030.40/x
  3. Step 3: Cross multiply
    113,751.20x = 170,756.40 × 67,030.40
  4. Step 4: Simplify right side
    113,751.20x = 11,445,869,794.56
  5. Step 5: Solve for x
    x = 11,445,869,794.56/113,751.20
  6. Step 6: Final answer
    x = 100,621.97

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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.