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Finding the Fourth Proportional to 136,135.20, 204,202.80 and 77,086.20

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Solution

The fourth proportional to 136,135.20, 204,202.80 and 77,086.20 is: 115,629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,135.20 : 204,202.80 = 77,086.20 : x
  2. Step 2: Convert to fraction form
    136,135.20/204,202.80 = 77,086.20/x
  3. Step 3: Cross multiply
    136,135.20x = 204,202.80 × 77,086.20
  4. Step 4: Simplify right side
    136,135.20x = 15,741,217,881.36
  5. Step 5: Solve for x
    x = 15,741,217,881.36/136,135.20
  6. Step 6: Final answer
    x = 115,629.30

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1.5x scale

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.