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Finding the Fourth Proportional to 176.31, 243.20 and 107.31

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Solution

The fourth proportional to 176.31, 243.20 and 107.31 is: 148.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.31 : 243.20 = 107.31 : x
  2. Step 2: Convert to fraction form
    176.31/243.20 = 107.31/x
  3. Step 3: Cross multiply
    176.31x = 243.20 × 107.31
  4. Step 4: Simplify right side
    176.31x = 26,097.26
  5. Step 5: Solve for x
    x = 26,097.26/176.31
  6. Step 6: Final answer
    x = 148.02

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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.