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Finding the Fourth Proportional to 136,770.21, 188,743.11 and 76,340.85

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Solution

The fourth proportional to 136,770.21, 188,743.11 and 76,340.85 is: 105,350.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,770.21 : 188,743.11 = 76,340.85 : x
  2. Step 2: Convert to fraction form
    136,770.21/188,743.11 = 76,340.85/x
  3. Step 3: Cross multiply
    136,770.21x = 188,743.11 × 76,340.85
  4. Step 4: Simplify right side
    136,770.21x = 14,408,809,449.04
  5. Step 5: Solve for x
    x = 14,408,809,449.04/136,770.21
  6. Step 6: Final answer
    x = 105,350.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.