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Finding the Fourth Proportional to 172,915.08, 259,395.30 and 67,720.38

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Solution

The fourth proportional to 172,915.08, 259,395.30 and 67,720.38 is: 101,589.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,915.08 : 259,395.30 = 67,720.38 : x
  2. Step 2: Convert to fraction form
    172,915.08/259,395.30 = 67,720.38/x
  3. Step 3: Cross multiply
    172,915.08x = 259,395.30 × 67,720.38
  4. Step 4: Simplify right side
    172,915.08x = 17,566,348,286.21
  5. Step 5: Solve for x
    x = 17,566,348,286.21/172,915.08
  6. Step 6: Final answer
    x = 101,589.45

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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.