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Finding the Fourth Proportional to 268,043.52, 402,021.51 and 90,546.60

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Solution

The fourth proportional to 268,043.52, 402,021.51 and 90,546.60 is: 135,805.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,043.52 : 402,021.51 = 90,546.60 : x
  2. Step 2: Convert to fraction form
    268,043.52/402,021.51 = 90,546.60/x
  3. Step 3: Cross multiply
    268,043.52x = 402,021.51 × 90,546.60
  4. Step 4: Simplify right side
    268,043.52x = 36,401,680,857.37
  5. Step 5: Solve for x
    x = 36,401,680,857.37/268,043.52
  6. Step 6: Final answer
    x = 135,805.11

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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.