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Finding the Fourth Proportional to 172,687.40, 258,512.70 and 102,530.60

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Solution

The fourth proportional to 172,687.40, 258,512.70 and 102,530.60 is: 153,488.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,687.40 : 258,512.70 = 102,530.60 : x
  2. Step 2: Convert to fraction form
    172,687.40/258,512.70 = 102,530.60/x
  3. Step 3: Cross multiply
    172,687.40x = 258,512.70 × 102,530.60
  4. Step 4: Simplify right side
    172,687.40x = 26,505,462,238.62
  5. Step 5: Solve for x
    x = 26,505,462,238.62/172,687.40
  6. Step 6: Final answer
    x = 153,488.11

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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.