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Finding the Fourth Proportional to 136,321.60, 188,119.20 and 76,694.08

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Solution

The fourth proportional to 136,321.60, 188,119.20 and 76,694.08 is: 105,835.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,321.60 : 188,119.20 = 76,694.08 : x
  2. Step 2: Convert to fraction form
    136,321.60/188,119.20 = 76,694.08/x
  3. Step 3: Cross multiply
    136,321.60x = 188,119.20 × 76,694.08
  4. Step 4: Simplify right side
    136,321.60x = 14,427,628,974.34
  5. Step 5: Solve for x
    x = 14,427,628,974.34/136,321.60
  6. Step 6: Final answer
    x = 105,835.24

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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.