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Finding the Fourth Proportional to 188,429.70, 282,207.15 and 128,943.30

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Solution

The fourth proportional to 188,429.70, 282,207.15 and 128,943.30 is: 193,115.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,429.70 : 282,207.15 = 128,943.30 : x
  2. Step 2: Convert to fraction form
    188,429.70/282,207.15 = 128,943.30/x
  3. Step 3: Cross multiply
    188,429.70x = 282,207.15 × 128,943.30
  4. Step 4: Simplify right side
    188,429.70x = 36,388,721,204.60
  5. Step 5: Solve for x
    x = 36,388,721,204.60/188,429.70
  6. Step 6: Final answer
    x = 193,115.64

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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.