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Finding the Fourth Proportional to 207,908.62, 311,830.53 and 67,666.30

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Solution

The fourth proportional to 207,908.62, 311,830.53 and 67,666.30 is: 101,488.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,908.62 : 311,830.53 = 67,666.30 : x
  2. Step 2: Convert to fraction form
    207,908.62/311,830.53 = 67,666.30/x
  3. Step 3: Cross multiply
    207,908.62x = 311,830.53 × 67,666.30
  4. Step 4: Simplify right side
    207,908.62x = 21,100,418,192.14
  5. Step 5: Solve for x
    x = 21,100,418,192.14/207,908.62
  6. Step 6: Final answer
    x = 101,488.91

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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.