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Finding the Fourth Proportional to 136,722.88, 188,654.97 and 91,328.05

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Solution

The fourth proportional to 136,722.88, 188,654.97 and 91,328.05 is: 126,017.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,722.88 : 188,654.97 = 91,328.05 : x
  2. Step 2: Convert to fraction form
    136,722.88/188,654.97 = 91,328.05/x
  3. Step 3: Cross multiply
    136,722.88x = 188,654.97 × 91,328.05
  4. Step 4: Simplify right side
    136,722.88x = 17,229,490,532.91
  5. Step 5: Solve for x
    x = 17,229,490,532.91/136,722.88
  6. Step 6: Final answer
    x = 126,017.61

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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.