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Finding the Fourth Proportional to 105.84, 158.64 and 73.28

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Solution

The fourth proportional to 105.84, 158.64 and 73.28 is: 109.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.84 : 158.64 = 73.28 : x
  2. Step 2: Convert to fraction form
    105.84/158.64 = 73.28/x
  3. Step 3: Cross multiply
    105.84x = 158.64 × 73.28
  4. Step 4: Simplify right side
    105.84x = 11,625.14
  5. Step 5: Solve for x
    x = 11,625.14/105.84
  6. Step 6: Final answer
    x = 109.84

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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.