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Finding the Fourth Proportional to 165,863.70, 228,891.89 and 90,412.20

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Solution

The fourth proportional to 165,863.70, 228,891.89 and 90,412.20 is: 124,768.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,863.70 : 228,891.89 = 90,412.20 : x
  2. Step 2: Convert to fraction form
    165,863.70/228,891.89 = 90,412.20/x
  3. Step 3: Cross multiply
    165,863.70x = 228,891.89 × 90,412.20
  4. Step 4: Simplify right side
    165,863.70x = 20,694,619,563.09
  5. Step 5: Solve for x
    x = 20,694,619,563.09/165,863.70
  6. Step 6: Final answer
    x = 124,768.83

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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.