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Finding the Fourth Proportional to 219,745.94, 303,298.88 and 129,131.01

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Solution

The fourth proportional to 219,745.94, 303,298.88 and 129,131.01 is: 178,229.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,745.94 : 303,298.88 = 129,131.01 : x
  2. Step 2: Convert to fraction form
    219,745.94/303,298.88 = 129,131.01/x
  3. Step 3: Cross multiply
    219,745.94x = 303,298.88 × 129,131.01
  4. Step 4: Simplify right side
    219,745.94x = 39,165,290,060.61
  5. Step 5: Solve for x
    x = 39,165,290,060.61/219,745.94
  6. Step 6: Final answer
    x = 178,229.87

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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.