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Finding the Fourth Proportional to 136,940.37, 188,958.90 and 76,503.51

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Solution

The fourth proportional to 136,940.37, 188,958.90 and 76,503.51 is: 105,564.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,940.37 : 188,958.90 = 76,503.51 : x
  2. Step 2: Convert to fraction form
    136,940.37/188,958.90 = 76,503.51/x
  3. Step 3: Cross multiply
    136,940.37x = 188,958.90 × 76,503.51
  4. Step 4: Simplify right side
    136,940.37x = 14,456,019,095.74
  5. Step 5: Solve for x
    x = 14,456,019,095.74/136,940.37
  6. Step 6: Final answer
    x = 105,564.34

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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.