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Finding the Fourth Proportional to 213,143.70, 319,715.55 and 149,553.30

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Solution

The fourth proportional to 213,143.70, 319,715.55 and 149,553.30 is: 224,329.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,143.70 : 319,715.55 = 149,553.30 : x
  2. Step 2: Convert to fraction form
    213,143.70/319,715.55 = 149,553.30/x
  3. Step 3: Cross multiply
    213,143.70x = 319,715.55 × 149,553.30
  4. Step 4: Simplify right side
    213,143.70x = 47,814,515,563.82
  5. Step 5: Solve for x
    x = 47,814,515,563.82/213,143.70
  6. Step 6: Final answer
    x = 224,329.95

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1.5x scale

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.