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Finding the Fourth Proportional to 104.84, 156.43 and 89.45

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Solution

The fourth proportional to 104.84, 156.43 and 89.45 is: 133.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.84 : 156.43 = 89.45 : x
  2. Step 2: Convert to fraction form
    104.84/156.43 = 89.45/x
  3. Step 3: Cross multiply
    104.84x = 156.43 × 89.45
  4. Step 4: Simplify right side
    104.84x = 13,992.22
  5. Step 5: Solve for x
    x = 13,992.22/104.84
  6. Step 6: Final answer
    x = 133.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.