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Finding the Fourth Proportional to 215,625.40, 323,000.70 and 122,021.80

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Solution

The fourth proportional to 215,625.40, 323,000.70 and 122,021.80 is: 182,785.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,625.40 : 323,000.70 = 122,021.80 : x
  2. Step 2: Convert to fraction form
    215,625.40/323,000.70 = 122,021.80/x
  3. Step 3: Cross multiply
    215,625.40x = 323,000.70 × 122,021.80
  4. Step 4: Simplify right side
    215,625.40x = 39,413,126,815.26
  5. Step 5: Solve for x
    x = 39,413,126,815.26/215,625.40
  6. Step 6: Final answer
    x = 182,785.18

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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.