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Finding the Fourth Proportional to 125.04, 172.45 and 103.17

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Solution

The fourth proportional to 125.04, 172.45 and 103.17 is: 142.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.04 : 172.45 = 103.17 : x
  2. Step 2: Convert to fraction form
    125.04/172.45 = 103.17/x
  3. Step 3: Cross multiply
    125.04x = 172.45 × 103.17
  4. Step 4: Simplify right side
    125.04x = 17,791.67
  5. Step 5: Solve for x
    x = 17,791.67/125.04
  6. Step 6: Final answer
    x = 142.29

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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.