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Finding the Fourth Proportional to 105.13, 157.48 and 89.04

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Solution

The fourth proportional to 105.13, 157.48 and 89.04 is: 133.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.13 : 157.48 = 89.04 : x
  2. Step 2: Convert to fraction form
    105.13/157.48 = 89.04/x
  3. Step 3: Cross multiply
    105.13x = 157.48 × 89.04
  4. Step 4: Simplify right side
    105.13x = 14,022.39
  5. Step 5: Solve for x
    x = 14,022.39/105.13
  6. Step 6: Final answer
    x = 133.38

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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.