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Finding the Fourth Proportional to 136,237.46, 188,005.89 and 76,621.46

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Solution

The fourth proportional to 136,237.46, 188,005.89 and 76,621.46 is: 105,736.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,237.46 : 188,005.89 = 76,621.46 : x
  2. Step 2: Convert to fraction form
    136,237.46/188,005.89 = 76,621.46/x
  3. Step 3: Cross multiply
    136,237.46x = 188,005.89 × 76,621.46
  4. Step 4: Simplify right side
    136,237.46x = 14,405,285,780.40
  5. Step 5: Solve for x
    x = 14,405,285,780.40/136,237.46
  6. Step 6: Final answer
    x = 105,736.60

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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.