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Finding the Fourth Proportional to 125.08, 172.80 and 88.18

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Solution

The fourth proportional to 125.08, 172.80 and 88.18 is: 121.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.08 : 172.80 = 88.18 : x
  2. Step 2: Convert to fraction form
    125.08/172.80 = 88.18/x
  3. Step 3: Cross multiply
    125.08x = 172.80 × 88.18
  4. Step 4: Simplify right side
    125.08x = 15,237.50
  5. Step 5: Solve for x
    x = 15,237.50/125.08
  6. Step 6: Final answer
    x = 121.82

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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.