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Finding the Fourth Proportional to 172,980.10, 259,265.35 and 73,140.10

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Solution

The fourth proportional to 172,980.10, 259,265.35 and 73,140.10 is: 109,623.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,980.10 : 259,265.35 = 73,140.10 : x
  2. Step 2: Convert to fraction form
    172,980.10/259,265.35 = 73,140.10/x
  3. Step 3: Cross multiply
    172,980.10x = 259,265.35 × 73,140.10
  4. Step 4: Simplify right side
    172,980.10x = 18,962,693,625.54
  5. Step 5: Solve for x
    x = 18,962,693,625.54/172,980.10
  6. Step 6: Final answer
    x = 109,623.56

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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.