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Finding the Fourth Proportional to 89.35, 123.36 and 58.31

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Solution

The fourth proportional to 89.35, 123.36 and 58.31 is: 80.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.35 : 123.36 = 58.31 : x
  2. Step 2: Convert to fraction form
    89.35/123.36 = 58.31/x
  3. Step 3: Cross multiply
    89.35x = 123.36 × 58.31
  4. Step 4: Simplify right side
    89.35x = 7,192.83
  5. Step 5: Solve for x
    x = 7,192.83/89.35
  6. Step 6: Final answer
    x = 80.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.