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Finding the Fourth Proportional to 353,431.20, 529,965.20 and 104,080.80

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Solution

The fourth proportional to 353,431.20, 529,965.20 and 104,080.80 is: 156,067.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,431.20 : 529,965.20 = 104,080.80 : x
  2. Step 2: Convert to fraction form
    353,431.20/529,965.20 = 104,080.80/x
  3. Step 3: Cross multiply
    353,431.20x = 529,965.20 × 104,080.80
  4. Step 4: Simplify right side
    353,431.20x = 55,159,201,988.16
  5. Step 5: Solve for x
    x = 55,159,201,988.16/353,431.20
  6. Step 6: Final answer
    x = 156,067.72

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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.