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Finding the Fourth Proportional to 114.13, 157.55 and 86.51

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Solution

The fourth proportional to 114.13, 157.55 and 86.51 is: 119.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.13 : 157.55 = 86.51 : x
  2. Step 2: Convert to fraction form
    114.13/157.55 = 86.51/x
  3. Step 3: Cross multiply
    114.13x = 157.55 × 86.51
  4. Step 4: Simplify right side
    114.13x = 13,629.65
  5. Step 5: Solve for x
    x = 13,629.65/114.13
  6. Step 6: Final answer
    x = 119.42

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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.