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Finding the Fourth Proportional to 125.36, 172.88 and 93.72

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Solution

The fourth proportional to 125.36, 172.88 and 93.72 is: 129.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.36 : 172.88 = 93.72 : x
  2. Step 2: Convert to fraction form
    125.36/172.88 = 93.72/x
  3. Step 3: Cross multiply
    125.36x = 172.88 × 93.72
  4. Step 4: Simplify right side
    125.36x = 16,202.31
  5. Step 5: Solve for x
    x = 16,202.31/125.36
  6. Step 6: Final answer
    x = 129.25

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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.