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Finding the Fourth Proportional to 86,705.49, 129,979.41 and 33,363.45

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Solution

The fourth proportional to 86,705.49, 129,979.41 and 33,363.45 is: 50,014.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,705.49 : 129,979.41 = 33,363.45 : x
  2. Step 2: Convert to fraction form
    86,705.49/129,979.41 = 33,363.45/x
  3. Step 3: Cross multiply
    86,705.49x = 129,979.41 × 33,363.45
  4. Step 4: Simplify right side
    86,705.49x = 4,336,561,546.56
  5. Step 5: Solve for x
    x = 4,336,561,546.56/86,705.49
  6. Step 6: Final answer
    x = 50,014.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.