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Finding the Fourth Proportional to 236,391.45, 326,213.74 and 128,961.45

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Solution

The fourth proportional to 236,391.45, 326,213.74 and 128,961.45 is: 177,963.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,391.45 : 326,213.74 = 128,961.45 : x
  2. Step 2: Convert to fraction form
    236,391.45/326,213.74 = 128,961.45/x
  3. Step 3: Cross multiply
    236,391.45x = 326,213.74 × 128,961.45
  4. Step 4: Simplify right side
    236,391.45x = 42,068,996,356.12
  5. Step 5: Solve for x
    x = 42,068,996,356.12/236,391.45
  6. Step 6: Final answer
    x = 177,963.28

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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.