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Finding the Fourth Proportional to 219,668.75, 303,133.25 and 129,034

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Solution

The fourth proportional to 219,668.75, 303,133.25 and 129,034 is: 178,061.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,668.75 : 303,133.25 = 129,034 : x
  2. Step 2: Convert to fraction form
    219,668.75/303,133.25 = 129,034/x
  3. Step 3: Cross multiply
    219,668.75x = 303,133.25 × 129,034
  4. Step 4: Simplify right side
    219,668.75x = 39,114,495,780.50
  5. Step 5: Solve for x
    x = 39,114,495,780.50/219,668.75
  6. Step 6: Final answer
    x = 178,061.27

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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.