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Finding the Fourth Proportional to 188,918.70, 283,706.10 and 100,345.20

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Solution

The fourth proportional to 188,918.70, 283,706.10 and 100,345.20 is: 150,692.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,918.70 : 283,706.10 = 100,345.20 : x
  2. Step 2: Convert to fraction form
    188,918.70/283,706.10 = 100,345.20/x
  3. Step 3: Cross multiply
    188,918.70x = 283,706.10 × 100,345.20
  4. Step 4: Simplify right side
    188,918.70x = 28,468,545,345.72
  5. Step 5: Solve for x
    x = 28,468,545,345.72/188,918.70
  6. Step 6: Final answer
    x = 150,692.05

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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.