Home / 136,915.11-188,942.83-76,485.74

Finding the Fourth Proportional to 136,915.11, 188,942.83 and 76,485.74

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Solution

The fourth proportional to 136,915.11, 188,942.83 and 76,485.74 is: 105,550.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,915.11 : 188,942.83 = 76,485.74 : x
  2. Step 2: Convert to fraction form
    136,915.11/188,942.83 = 76,485.74/x
  3. Step 3: Cross multiply
    136,915.11x = 188,942.83 × 76,485.74
  4. Step 4: Simplify right side
    136,915.11x = 14,451,431,034.32
  5. Step 5: Solve for x
    x = 14,451,431,034.32/136,915.11
  6. Step 6: Final answer
    x = 105,550.30

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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.