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Finding the Fourth Proportional to 172,987.62, 259,492.41 and 73,129.20

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Solution

The fourth proportional to 172,987.62, 259,492.41 and 73,129.20 is: 109,698.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,987.62 : 259,492.41 = 73,129.20 : x
  2. Step 2: Convert to fraction form
    172,987.62/259,492.41 = 73,129.20/x
  3. Step 3: Cross multiply
    172,987.62x = 259,492.41 × 73,129.20
  4. Step 4: Simplify right side
    172,987.62x = 18,976,472,349.37
  5. Step 5: Solve for x
    x = 18,976,472,349.37/172,987.62
  6. Step 6: Final answer
    x = 109,698.44

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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.