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Finding the Fourth Proportional to 178.37, 246.15 and 129.32

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Solution

The fourth proportional to 178.37, 246.15 and 129.32 is: 178.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.37 : 246.15 = 129.32 : x
  2. Step 2: Convert to fraction form
    178.37/246.15 = 129.32/x
  3. Step 3: Cross multiply
    178.37x = 246.15 × 129.32
  4. Step 4: Simplify right side
    178.37x = 31,830.89
  5. Step 5: Solve for x
    x = 31,830.89/178.37
  6. Step 6: Final answer
    x = 178.46

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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.