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Finding the Fourth Proportional to 172,817.80, 258,935.10 and 83,879.80

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Solution

The fourth proportional to 172,817.80, 258,935.10 and 83,879.80 is: 125,678.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,817.80 : 258,935.10 = 83,879.80 : x
  2. Step 2: Convert to fraction form
    172,817.80/258,935.10 = 83,879.80/x
  3. Step 3: Cross multiply
    172,817.80x = 258,935.10 × 83,879.80
  4. Step 4: Simplify right side
    172,817.80x = 21,719,424,400.98
  5. Step 5: Solve for x
    x = 21,719,424,400.98/172,817.80
  6. Step 6: Final answer
    x = 125,678.17

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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.