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Finding the Fourth Proportional to 217,603.61, 300,215.99 and 142,195.85

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Solution

The fourth proportional to 217,603.61, 300,215.99 and 142,195.85 is: 196,179.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,603.61 : 300,215.99 = 142,195.85 : x
  2. Step 2: Convert to fraction form
    217,603.61/300,215.99 = 142,195.85/x
  3. Step 3: Cross multiply
    217,603.61x = 300,215.99 × 142,195.85
  4. Step 4: Simplify right side
    217,603.61x = 42,689,466,736.05
  5. Step 5: Solve for x
    x = 42,689,466,736.05/217,603.61
  6. Step 6: Final answer
    x = 196,179.96

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1.5x scale

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.