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Finding the Fourth Proportional to 172,108.41, 257,609.79 and 91,945.95

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Solution

The fourth proportional to 172,108.41, 257,609.79 and 91,945.95 is: 137,623.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,108.41 : 257,609.79 = 91,945.95 : x
  2. Step 2: Convert to fraction form
    172,108.41/257,609.79 = 91,945.95/x
  3. Step 3: Cross multiply
    172,108.41x = 257,609.79 × 91,945.95
  4. Step 4: Simplify right side
    172,108.41x = 23,686,176,870.85
  5. Step 5: Solve for x
    x = 23,686,176,870.85/172,108.41
  6. Step 6: Final answer
    x = 137,623.59

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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.