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Finding the Fourth Proportional to 125.25, 172.82 and 92.10

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Solution

The fourth proportional to 125.25, 172.82 and 92.10 is: 127.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.25 : 172.82 = 92.10 : x
  2. Step 2: Convert to fraction form
    125.25/172.82 = 92.10/x
  3. Step 3: Cross multiply
    125.25x = 172.82 × 92.10
  4. Step 4: Simplify right side
    125.25x = 15,916.26
  5. Step 5: Solve for x
    x = 15,916.26/125.25
  6. Step 6: Final answer
    x = 127.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.