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Finding the Fourth Proportional to 171,989.39, 258,028.64 and 65,375.17

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Solution

The fourth proportional to 171,989.39, 258,028.64 and 65,375.17 is: 98,079.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,989.39 : 258,028.64 = 65,375.17 : x
  2. Step 2: Convert to fraction form
    171,989.39/258,028.64 = 65,375.17/x
  3. Step 3: Cross multiply
    171,989.39x = 258,028.64 × 65,375.17
  4. Step 4: Simplify right side
    171,989.39x = 16,868,665,478.08
  5. Step 5: Solve for x
    x = 16,868,665,478.08/171,989.39
  6. Step 6: Final answer
    x = 98,079.69

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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.