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Finding the Fourth Proportional to 136,546.81, 188,357.42 and 85,470.88

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Solution

The fourth proportional to 136,546.81, 188,357.42 and 85,470.88 is: 117,901.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,546.81 : 188,357.42 = 85,470.88 : x
  2. Step 2: Convert to fraction form
    136,546.81/188,357.42 = 85,470.88/x
  3. Step 3: Cross multiply
    136,546.81x = 188,357.42 × 85,470.88
  4. Step 4: Simplify right side
    136,546.81x = 16,099,074,441.93
  5. Step 5: Solve for x
    x = 16,099,074,441.93/136,546.81
  6. Step 6: Final answer
    x = 117,901.51

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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.