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Finding the Fourth Proportional to 165,987.36, 248,853.42 and 85,939.50

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Solution

The fourth proportional to 165,987.36, 248,853.42 and 85,939.50 is: 128,843.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,987.36 : 248,853.42 = 85,939.50 : x
  2. Step 2: Convert to fraction form
    165,987.36/248,853.42 = 85,939.50/x
  3. Step 3: Cross multiply
    165,987.36x = 248,853.42 × 85,939.50
  4. Step 4: Simplify right side
    165,987.36x = 21,386,338,488.09
  5. Step 5: Solve for x
    x = 21,386,338,488.09/165,987.36
  6. Step 6: Final answer
    x = 128,843.18

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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.