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Finding the Fourth Proportional to 219,755.92, 303,312.68 and 129,141

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Solution

The fourth proportional to 219,755.92, 303,312.68 and 129,141 is: 178,243.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,755.92 : 303,312.68 = 129,141 : x
  2. Step 2: Convert to fraction form
    219,755.92/303,312.68 = 129,141/x
  3. Step 3: Cross multiply
    219,755.92x = 303,312.68 × 129,141
  4. Step 4: Simplify right side
    219,755.92x = 39,170,102,807.88
  5. Step 5: Solve for x
    x = 39,170,102,807.88/219,755.92
  6. Step 6: Final answer
    x = 178,243.68

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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.