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Finding the Fourth Proportional to 172,871.70, 259,307.55 and 154,209.30

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Solution

The fourth proportional to 172,871.70, 259,307.55 and 154,209.30 is: 231,313.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,871.70 : 259,307.55 = 154,209.30 : x
  2. Step 2: Convert to fraction form
    172,871.70/259,307.55 = 154,209.30/x
  3. Step 3: Cross multiply
    172,871.70x = 259,307.55 × 154,209.30
  4. Step 4: Simplify right side
    172,871.70x = 39,987,635,770.22
  5. Step 5: Solve for x
    x = 39,987,635,770.22/172,871.70
  6. Step 6: Final answer
    x = 231,313.95

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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.