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Finding the Fourth Proportional to 113.51, 169.82 and 98.47

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Solution

The fourth proportional to 113.51, 169.82 and 98.47 is: 147.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.51 : 169.82 = 98.47 : x
  2. Step 2: Convert to fraction form
    113.51/169.82 = 98.47/x
  3. Step 3: Cross multiply
    113.51x = 169.82 × 98.47
  4. Step 4: Simplify right side
    113.51x = 16,720.83
  5. Step 5: Solve for x
    x = 16,720.83/113.51
  6. Step 6: Final answer
    x = 147.31

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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.