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Finding the Fourth Proportional to 136,494.60, 204,523.20 and 86,485.20

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Solution

The fourth proportional to 136,494.60, 204,523.20 and 86,485.20 is: 129,589.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,494.60 : 204,523.20 = 86,485.20 : x
  2. Step 2: Convert to fraction form
    136,494.60/204,523.20 = 86,485.20/x
  3. Step 3: Cross multiply
    136,494.60x = 204,523.20 × 86,485.20
  4. Step 4: Simplify right side
    136,494.60x = 17,688,229,856.64
  5. Step 5: Solve for x
    x = 17,688,229,856.64/136,494.60
  6. Step 6: Final answer
    x = 129,589.23

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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.