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Finding the Fourth Proportional to 136,138.73, 187,844.47 and 82,428.74

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Solution

The fourth proportional to 136,138.73, 187,844.47 and 82,428.74 is: 113,735.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,138.73 : 187,844.47 = 82,428.74 : x
  2. Step 2: Convert to fraction form
    136,138.73/187,844.47 = 82,428.74/x
  3. Step 3: Cross multiply
    136,138.73x = 187,844.47 × 82,428.74
  4. Step 4: Simplify right side
    136,138.73x = 15,483,782,537.19
  5. Step 5: Solve for x
    x = 15,483,782,537.19/136,138.73
  6. Step 6: Final answer
    x = 113,735.33

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1.5x scale

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.