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Finding the Fourth Proportional to 172.40, 237.83 and 135.50

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Solution

The fourth proportional to 172.40, 237.83 and 135.50 is: 186.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.40 : 237.83 = 135.50 : x
  2. Step 2: Convert to fraction form
    172.40/237.83 = 135.50/x
  3. Step 3: Cross multiply
    172.40x = 237.83 × 135.50
  4. Step 4: Simplify right side
    172.40x = 32,224.10
  5. Step 5: Solve for x
    x = 32,224.10/172.40
  6. Step 6: Final answer
    x = 186.92

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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.