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Finding the Fourth Proportional to 125.09, 172.62 and 71.19

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Solution

The fourth proportional to 125.09, 172.62 and 71.19 is: 98.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.09 : 172.62 = 71.19 : x
  2. Step 2: Convert to fraction form
    125.09/172.62 = 71.19/x
  3. Step 3: Cross multiply
    125.09x = 172.62 × 71.19
  4. Step 4: Simplify right side
    125.09x = 12,289.00
  5. Step 5: Solve for x
    x = 12,289.00/125.09
  6. Step 6: Final answer
    x = 98.24

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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.