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Finding the Fourth Proportional to 113,740.80, 170,751.60 and 71,620.80

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Solution

The fourth proportional to 113,740.80, 170,751.60 and 71,620.80 is: 107,519.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,740.80 : 170,751.60 = 71,620.80 : x
  2. Step 2: Convert to fraction form
    113,740.80/170,751.60 = 71,620.80/x
  3. Step 3: Cross multiply
    113,740.80x = 170,751.60 × 71,620.80
  4. Step 4: Simplify right side
    113,740.80x = 12,229,366,193.28
  5. Step 5: Solve for x
    x = 12,229,366,193.28/113,740.80
  6. Step 6: Final answer
    x = 107,519.61

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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.