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Finding the Fourth Proportional to 219,751.92, 303,307.16 and 129,137

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Solution

The fourth proportional to 219,751.92, 303,307.16 and 129,137 is: 178,238.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,751.92 : 303,307.16 = 129,137 : x
  2. Step 2: Convert to fraction form
    219,751.92/303,307.16 = 129,137/x
  3. Step 3: Cross multiply
    219,751.92x = 303,307.16 × 129,137
  4. Step 4: Simplify right side
    219,751.92x = 39,168,176,720.92
  5. Step 5: Solve for x
    x = 39,168,176,720.92/219,751.92
  6. Step 6: Final answer
    x = 178,238.15

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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.