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Finding the Fourth Proportional to 236,008.78, 325,691.13 and 128,578.48

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Solution

The fourth proportional to 236,008.78, 325,691.13 and 128,578.48 is: 177,437.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,008.78 : 325,691.13 = 128,578.48 : x
  2. Step 2: Convert to fraction form
    236,008.78/325,691.13 = 128,578.48/x
  3. Step 3: Cross multiply
    236,008.78x = 325,691.13 × 128,578.48
  4. Step 4: Simplify right side
    236,008.78x = 41,876,870,444.88
  5. Step 5: Solve for x
    x = 41,876,870,444.88/236,008.78
  6. Step 6: Final answer
    x = 177,437.77

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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.