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Finding the Fourth Proportional to 113,748.80, 170,763.60 and 71,628.80

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Solution

The fourth proportional to 113,748.80, 170,763.60 and 71,628.80 is: 107,531.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,748.80 : 170,763.60 = 71,628.80 : x
  2. Step 2: Convert to fraction form
    113,748.80/170,763.60 = 71,628.80/x
  3. Step 3: Cross multiply
    113,748.80x = 170,763.60 × 71,628.80
  4. Step 4: Simplify right side
    113,748.80x = 12,231,591,751.68
  5. Step 5: Solve for x
    x = 12,231,591,751.68/113,748.80
  6. Step 6: Final answer
    x = 107,531.61

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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.