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Finding the Fourth Proportional to 136,659.65, 188,590.60 and 76,228.73

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Solution

The fourth proportional to 136,659.65, 188,590.60 and 76,228.73 is: 105,195.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,659.65 : 188,590.60 = 76,228.73 : x
  2. Step 2: Convert to fraction form
    136,659.65/188,590.60 = 76,228.73/x
  3. Step 3: Cross multiply
    136,659.65x = 188,590.60 × 76,228.73
  4. Step 4: Simplify right side
    136,659.65x = 14,376,021,927.94
  5. Step 5: Solve for x
    x = 14,376,021,927.94/136,659.65
  6. Step 6: Final answer
    x = 105,195.81

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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.