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Finding the Fourth Proportional to 170.51, 235.44 and 115.22

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Solution

The fourth proportional to 170.51, 235.44 and 115.22 is: 159.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.51 : 235.44 = 115.22 : x
  2. Step 2: Convert to fraction form
    170.51/235.44 = 115.22/x
  3. Step 3: Cross multiply
    170.51x = 235.44 × 115.22
  4. Step 4: Simplify right side
    170.51x = 27,127.99
  5. Step 5: Solve for x
    x = 27,127.99/170.51
  6. Step 6: Final answer
    x = 159.10

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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.