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Finding the Fourth Proportional to 172,813.72, 259,126.77 and 77,932.89

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Solution

The fourth proportional to 172,813.72, 259,126.77 and 77,932.89 is: 116,857.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,813.72 : 259,126.77 = 77,932.89 : x
  2. Step 2: Convert to fraction form
    172,813.72/259,126.77 = 77,932.89/x
  3. Step 3: Cross multiply
    172,813.72x = 259,126.77 × 77,932.89
  4. Step 4: Simplify right side
    172,813.72x = 20,194,496,766.83
  5. Step 5: Solve for x
    x = 20,194,496,766.83/172,813.72
  6. Step 6: Final answer
    x = 116,857.03

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1.5x scale

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.