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Finding the Fourth Proportional to 136,690.80, 204,575.40 and 125,631.60

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Solution

The fourth proportional to 136,690.80, 204,575.40 and 125,631.60 is: 188,023.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,690.80 : 204,575.40 = 125,631.60 : x
  2. Step 2: Convert to fraction form
    136,690.80/204,575.40 = 125,631.60/x
  3. Step 3: Cross multiply
    136,690.80x = 204,575.40 × 125,631.60
  4. Step 4: Simplify right side
    136,690.80x = 25,701,134,822.64
  5. Step 5: Solve for x
    x = 25,701,134,822.64/136,690.80
  6. Step 6: Final answer
    x = 188,023.88

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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.