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Finding the Fourth Proportional to 136,906.20, 188,929.08 and 76,482.90

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Solution

The fourth proportional to 136,906.20, 188,929.08 and 76,482.90 is: 105,545.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,906.20 : 188,929.08 = 76,482.90 : x
  2. Step 2: Convert to fraction form
    136,906.20/188,929.08 = 76,482.90/x
  3. Step 3: Cross multiply
    136,906.20x = 188,929.08 × 76,482.90
  4. Step 4: Simplify right side
    136,906.20x = 14,449,843,932.73
  5. Step 5: Solve for x
    x = 14,449,843,932.73/136,906.20
  6. Step 6: Final answer
    x = 105,545.58

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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.