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Finding the Fourth Proportional to 236,368.16, 326,194.20 and 128,940

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Solution

The fourth proportional to 236,368.16, 326,194.20 and 128,940 is: 177,940.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,368.16 : 326,194.20 = 128,940 : x
  2. Step 2: Convert to fraction form
    236,368.16/326,194.20 = 128,940/x
  3. Step 3: Cross multiply
    236,368.16x = 326,194.20 × 128,940
  4. Step 4: Simplify right side
    236,368.16x = 42,059,480,148
  5. Step 5: Solve for x
    x = 42,059,480,148/236,368.16
  6. Step 6: Final answer
    x = 177,940.55

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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.