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Finding the Fourth Proportional to 123,357.33, 170,234.53 and 72,370.97

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Solution

The fourth proportional to 123,357.33, 170,234.53 and 72,370.97 is: 99,872.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,357.33 : 170,234.53 = 72,370.97 : x
  2. Step 2: Convert to fraction form
    123,357.33/170,234.53 = 72,370.97/x
  3. Step 3: Cross multiply
    123,357.33x = 170,234.53 × 72,370.97
  4. Step 4: Simplify right side
    123,357.33x = 12,320,037,669.87
  5. Step 5: Solve for x
    x = 12,320,037,669.87/123,357.33
  6. Step 6: Final answer
    x = 99,872.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.