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Finding the Fourth Proportional to 116.51, 161.87 and 115.02

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Solution

The fourth proportional to 116.51, 161.87 and 115.02 is: 159.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.51 : 161.87 = 115.02 : x
  2. Step 2: Convert to fraction form
    116.51/161.87 = 115.02/x
  3. Step 3: Cross multiply
    116.51x = 161.87 × 115.02
  4. Step 4: Simplify right side
    116.51x = 18,617.71
  5. Step 5: Solve for x
    x = 18,617.71/116.51
  6. Step 6: Final answer
    x = 159.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.