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Finding the Fourth Proportional to 279,136.84, 418,641.90 and 79,453

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Solution

The fourth proportional to 279,136.84, 418,641.90 and 79,453 is: 119,161.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,136.84 : 418,641.90 = 79,453 : x
  2. Step 2: Convert to fraction form
    279,136.84/418,641.90 = 79,453/x
  3. Step 3: Cross multiply
    279,136.84x = 418,641.90 × 79,453
  4. Step 4: Simplify right side
    279,136.84x = 33,262,354,880.70
  5. Step 5: Solve for x
    x = 33,262,354,880.70/279,136.84
  6. Step 6: Final answer
    x = 119,161.47

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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.