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Finding the Fourth Proportional to 172,635.42, 258,684.54 and 65,961.21

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Solution

The fourth proportional to 172,635.42, 258,684.54 and 65,961.21 is: 98,839.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,635.42 : 258,684.54 = 65,961.21 : x
  2. Step 2: Convert to fraction form
    172,635.42/258,684.54 = 65,961.21/x
  3. Step 3: Cross multiply
    172,635.42x = 258,684.54 × 65,961.21
  4. Step 4: Simplify right side
    172,635.42x = 17,063,145,266.69
  5. Step 5: Solve for x
    x = 17,063,145,266.69/172,635.42
  6. Step 6: Final answer
    x = 98,839.19

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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.