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Finding the Fourth Proportional to 136,469.60, 204,485.70 and 86,460.20

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Solution

The fourth proportional to 136,469.60, 204,485.70 and 86,460.20 is: 129,551.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,469.60 : 204,485.70 = 86,460.20 : x
  2. Step 2: Convert to fraction form
    136,469.60/204,485.70 = 86,460.20/x
  3. Step 3: Cross multiply
    136,469.60x = 204,485.70 × 86,460.20
  4. Step 4: Simplify right side
    136,469.60x = 17,679,874,519.14
  5. Step 5: Solve for x
    x = 17,679,874,519.14/136,469.60
  6. Step 6: Final answer
    x = 129,551.74

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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.