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Finding the Fourth Proportional to 172.16, 237.54 and 117.08

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Solution

The fourth proportional to 172.16, 237.54 and 117.08 is: 161.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.16 : 237.54 = 117.08 : x
  2. Step 2: Convert to fraction form
    172.16/237.54 = 117.08/x
  3. Step 3: Cross multiply
    172.16x = 237.54 × 117.08
  4. Step 4: Simplify right side
    172.16x = 27,811.18
  5. Step 5: Solve for x
    x = 27,811.18/172.16
  6. Step 6: Final answer
    x = 161.54

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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.