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Finding the Fourth Proportional to 279,124.38, 418,496.94 and 142,010.46

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Solution

The fourth proportional to 279,124.38, 418,496.94 and 142,010.46 is: 212,919.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,124.38 : 418,496.94 = 142,010.46 : x
  2. Step 2: Convert to fraction form
    279,124.38/418,496.94 = 142,010.46/x
  3. Step 3: Cross multiply
    279,124.38x = 418,496.94 × 142,010.46
  4. Step 4: Simplify right side
    279,124.38x = 59,430,942,957.99
  5. Step 5: Solve for x
    x = 59,430,942,957.99/279,124.38
  6. Step 6: Final answer
    x = 212,919.21

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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.