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Finding the Fourth Proportional to 125.39, 172.99 and 75.58

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Solution

The fourth proportional to 125.39, 172.99 and 75.58 is: 104.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.39 : 172.99 = 75.58 : x
  2. Step 2: Convert to fraction form
    125.39/172.99 = 75.58/x
  3. Step 3: Cross multiply
    125.39x = 172.99 × 75.58
  4. Step 4: Simplify right side
    125.39x = 13,074.58
  5. Step 5: Solve for x
    x = 13,074.58/125.39
  6. Step 6: Final answer
    x = 104.27

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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.