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Finding the Fourth Proportional to 114.90, 172.34 and 46.43

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Solution

The fourth proportional to 114.90, 172.34 and 46.43 is: 69.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.90 : 172.34 = 46.43 : x
  2. Step 2: Convert to fraction form
    114.90/172.34 = 46.43/x
  3. Step 3: Cross multiply
    114.90x = 172.34 × 46.43
  4. Step 4: Simplify right side
    114.90x = 8,001.47
  5. Step 5: Solve for x
    x = 8,001.47/114.90
  6. Step 6: Final answer
    x = 69.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.