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Finding the Fourth Proportional to 172,078.53, 257,948.51 and 72,267.09

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Solution

The fourth proportional to 172,078.53, 257,948.51 and 72,267.09 is: 108,329.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,078.53 : 257,948.51 = 72,267.09 : x
  2. Step 2: Convert to fraction form
    172,078.53/257,948.51 = 72,267.09/x
  3. Step 3: Cross multiply
    172,078.53x = 257,948.51 × 72,267.09
  4. Step 4: Simplify right side
    172,078.53x = 18,641,187,826.20
  5. Step 5: Solve for x
    x = 18,641,187,826.20/172,078.53
  6. Step 6: Final answer
    x = 108,329.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.