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Finding the Fourth Proportional to 136,850.63, 188,850.20 and 76,419.59

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Solution

The fourth proportional to 136,850.63, 188,850.20 and 76,419.59 is: 105,456.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,850.63 : 188,850.20 = 76,419.59 : x
  2. Step 2: Convert to fraction form
    136,850.63/188,850.20 = 76,419.59/x
  3. Step 3: Cross multiply
    136,850.63x = 188,850.20 × 76,419.59
  4. Step 4: Simplify right side
    136,850.63x = 14,431,853,529.07
  5. Step 5: Solve for x
    x = 14,431,853,529.07/136,850.63
  6. Step 6: Final answer
    x = 105,456.98

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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.