Home / 165,691.15-228,653.76-90,239.65

Finding the Fourth Proportional to 165,691.15, 228,653.76 and 90,239.65

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Solution

The fourth proportional to 165,691.15, 228,653.76 and 90,239.65 is: 124,530.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,691.15 : 228,653.76 = 90,239.65 : x
  2. Step 2: Convert to fraction form
    165,691.15/228,653.76 = 90,239.65/x
  3. Step 3: Cross multiply
    165,691.15x = 228,653.76 × 90,239.65
  4. Step 4: Simplify right side
    165,691.15x = 20,633,635,273.58
  5. Step 5: Solve for x
    x = 20,633,635,273.58/165,691.15
  6. Step 6: Final answer
    x = 124,530.70

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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.