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Finding the Fourth Proportional to 136,765.67, 188,728.94 and 76,340.21

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Solution

The fourth proportional to 136,765.67, 188,728.94 and 76,340.21 is: 105,345.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,765.67 : 188,728.94 = 76,340.21 : x
  2. Step 2: Convert to fraction form
    136,765.67/188,728.94 = 76,340.21/x
  3. Step 3: Cross multiply
    136,765.67x = 188,728.94 × 76,340.21
  4. Step 4: Simplify right side
    136,765.67x = 14,407,606,912.68
  5. Step 5: Solve for x
    x = 14,407,606,912.68/136,765.67
  6. Step 6: Final answer
    x = 105,345.20

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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.