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Finding the Fourth Proportional to 172.06, 257.93 and 69.32

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Solution

The fourth proportional to 172.06, 257.93 and 69.32 is: 103.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.06 : 257.93 = 69.32 : x
  2. Step 2: Convert to fraction form
    172.06/257.93 = 69.32/x
  3. Step 3: Cross multiply
    172.06x = 257.93 × 69.32
  4. Step 4: Simplify right side
    172.06x = 17,880.27
  5. Step 5: Solve for x
    x = 17,880.27/172.06
  6. Step 6: Final answer
    x = 103.92

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.