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Finding the Fourth Proportional to 114.72, 172.88 and 114.72

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Solution

The fourth proportional to 114.72, 172.88 and 114.72 is: 172.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.72 : 172.88 = 114.72 : x
  2. Step 2: Convert to fraction form
    114.72/172.88 = 114.72/x
  3. Step 3: Cross multiply
    114.72x = 172.88 × 114.72
  4. Step 4: Simplify right side
    114.72x = 19,832.79
  5. Step 5: Solve for x
    x = 19,832.79/114.72
  6. Step 6: Final answer
    x = 172.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.