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Finding the Fourth Proportional to 172.53, 237.74 and 130.61

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Solution

The fourth proportional to 172.53, 237.74 and 130.61 is: 179.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.53 : 237.74 = 130.61 : x
  2. Step 2: Convert to fraction form
    172.53/237.74 = 130.61/x
  3. Step 3: Cross multiply
    172.53x = 237.74 × 130.61
  4. Step 4: Simplify right side
    172.53x = 31,051.16
  5. Step 5: Solve for x
    x = 31,051.16/172.53
  6. Step 6: Final answer
    x = 179.98

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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.