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Finding the Fourth Proportional to 136,891.50, 188,914.32 and 76,464.69

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Solution

The fourth proportional to 136,891.50, 188,914.32 and 76,464.69 is: 105,523.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,891.50 : 188,914.32 = 76,464.69 : x
  2. Step 2: Convert to fraction form
    136,891.50/188,914.32 = 76,464.69/x
  3. Step 3: Cross multiply
    136,891.50x = 188,914.32 × 76,464.69
  4. Step 4: Simplify right side
    136,891.50x = 14,445,274,915.36
  5. Step 5: Solve for x
    x = 14,445,274,915.36/136,891.50
  6. Step 6: Final answer
    x = 105,523.53

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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.