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Finding the Fourth Proportional to 172.19, 237.46 and 137.18

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Solution

The fourth proportional to 172.19, 237.46 and 137.18 is: 189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.19 : 237.46 = 137.18 : x
  2. Step 2: Convert to fraction form
    172.19/237.46 = 137.18/x
  3. Step 3: Cross multiply
    172.19x = 237.46 × 137.18
  4. Step 4: Simplify right side
    172.19x = 32,574.76
  5. Step 5: Solve for x
    x = 32,574.76/172.19
  6. Step 6: Final answer
    x = 189.18

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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.