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Finding the Fourth Proportional to 312,891.02, 431,790.54 and 169,651.10

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Solution

The fourth proportional to 312,891.02, 431,790.54 and 169,651.10 is: 234,119.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,891.02 : 431,790.54 = 169,651.10 : x
  2. Step 2: Convert to fraction form
    312,891.02/431,790.54 = 169,651.10/x
  3. Step 3: Cross multiply
    312,891.02x = 431,790.54 × 169,651.10
  4. Step 4: Simplify right side
    312,891.02x = 73,253,740,080.59
  5. Step 5: Solve for x
    x = 73,253,740,080.59/312,891.02
  6. Step 6: Final answer
    x = 234,119.02

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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.