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Finding the Fourth Proportional to 219,750.92, 303,305.78 and 129,136

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Solution

The fourth proportional to 219,750.92, 303,305.78 and 129,136 is: 178,236.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,750.92 : 303,305.78 = 129,136 : x
  2. Step 2: Convert to fraction form
    219,750.92/303,305.78 = 129,136/x
  3. Step 3: Cross multiply
    219,750.92x = 303,305.78 × 129,136
  4. Step 4: Simplify right side
    219,750.92x = 39,167,695,206.08
  5. Step 5: Solve for x
    x = 39,167,695,206.08/219,750.92
  6. Step 6: Final answer
    x = 178,236.77

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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.