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Finding the Fourth Proportional to 136,693.20, 188,356.68 and 100,826.40

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Solution

The fourth proportional to 136,693.20, 188,356.68 and 100,826.40 is: 138,933.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,693.20 : 188,356.68 = 100,826.40 : x
  2. Step 2: Convert to fraction form
    136,693.20/188,356.68 = 100,826.40/x
  3. Step 3: Cross multiply
    136,693.20x = 188,356.68 × 100,826.40
  4. Step 4: Simplify right side
    136,693.20x = 18,991,325,960.35
  5. Step 5: Solve for x
    x = 18,991,325,960.35/136,693.20
  6. Step 6: Final answer
    x = 138,933.95

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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.