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Finding the Fourth Proportional to 172,912.83, 259,391.94 and 67,718.13

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Solution

The fourth proportional to 172,912.83, 259,391.94 and 67,718.13 is: 101,586.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,912.83 : 259,391.94 = 67,718.13 : x
  2. Step 2: Convert to fraction form
    172,912.83/259,391.94 = 67,718.13/x
  3. Step 3: Cross multiply
    172,912.83x = 259,391.94 × 67,718.13
  4. Step 4: Simplify right side
    172,912.83x = 17,565,537,113.87
  5. Step 5: Solve for x
    x = 17,565,537,113.87/172,912.83
  6. Step 6: Final answer
    x = 101,586.08

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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.