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Finding the Fourth Proportional to 136,615.60, 204,704.70 and 86,606.20

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Solution

The fourth proportional to 136,615.60, 204,704.70 and 86,606.20 is: 129,770.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,615.60 : 204,704.70 = 86,606.20 : x
  2. Step 2: Convert to fraction form
    136,615.60/204,704.70 = 86,606.20/x
  3. Step 3: Cross multiply
    136,615.60x = 204,704.70 × 86,606.20
  4. Step 4: Simplify right side
    136,615.60x = 17,728,696,189.14
  5. Step 5: Solve for x
    x = 17,728,696,189.14/136,615.60
  6. Step 6: Final answer
    x = 129,770.66

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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.