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Finding the Fourth Proportional to 194,328.80, 291,320.40 and 115,359.20

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Solution

The fourth proportional to 194,328.80, 291,320.40 and 115,359.20 is: 172,936.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,328.80 : 291,320.40 = 115,359.20 : x
  2. Step 2: Convert to fraction form
    194,328.80/291,320.40 = 115,359.20/x
  3. Step 3: Cross multiply
    194,328.80x = 291,320.40 × 115,359.20
  4. Step 4: Simplify right side
    194,328.80x = 33,606,488,287.68
  5. Step 5: Solve for x
    x = 33,606,488,287.68/194,328.80
  6. Step 6: Final answer
    x = 172,936.22

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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.