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Finding the Fourth Proportional to 113,818.80, 170,868.60 and 71,698.80

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Solution

The fourth proportional to 113,818.80, 170,868.60 and 71,698.80 is: 107,636.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,818.80 : 170,868.60 = 71,698.80 : x
  2. Step 2: Convert to fraction form
    113,818.80/170,868.60 = 71,698.80/x
  3. Step 3: Cross multiply
    113,818.80x = 170,868.60 × 71,698.80
  4. Step 4: Simplify right side
    113,818.80x = 12,251,073,577.68
  5. Step 5: Solve for x
    x = 12,251,073,577.68/113,818.80
  6. Step 6: Final answer
    x = 107,636.64

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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.