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Finding the Fourth Proportional to 114.09, 157.51 and 105.31

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Solution

The fourth proportional to 114.09, 157.51 and 105.31 is: 145.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.09 : 157.51 = 105.31 : x
  2. Step 2: Convert to fraction form
    114.09/157.51 = 105.31/x
  3. Step 3: Cross multiply
    114.09x = 157.51 × 105.31
  4. Step 4: Simplify right side
    114.09x = 16,587.38
  5. Step 5: Solve for x
    x = 16,587.38/114.09
  6. Step 6: Final answer
    x = 145.39

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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.