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Finding the Fourth Proportional to 89.04, 134.24 and 83.16

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Solution

The fourth proportional to 89.04, 134.24 and 83.16 is: 125.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.04 : 134.24 = 83.16 : x
  2. Step 2: Convert to fraction form
    89.04/134.24 = 83.16/x
  3. Step 3: Cross multiply
    89.04x = 134.24 × 83.16
  4. Step 4: Simplify right side
    89.04x = 11,162.98
  5. Step 5: Solve for x
    x = 11,162.98/89.04
  6. Step 6: Final answer
    x = 125.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.