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Finding the Fourth Proportional to 275,107, 379,653.42 and 155,875

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Solution

The fourth proportional to 275,107, 379,653.42 and 155,875 is: 215,110.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,107 : 379,653.42 = 155,875 : x
  2. Step 2: Convert to fraction form
    275,107/379,653.42 = 155,875/x
  3. Step 3: Cross multiply
    275,107x = 379,653.42 × 155,875
  4. Step 4: Simplify right side
    275,107x = 59,178,476,842.50
  5. Step 5: Solve for x
    x = 59,178,476,842.50/275,107
  6. Step 6: Final answer
    x = 215,110.76

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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.