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Finding the Fourth Proportional to 89.98, 134.90 and 44.32

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Solution

The fourth proportional to 89.98, 134.90 and 44.32 is: 66.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.98 : 134.90 = 44.32 : x
  2. Step 2: Convert to fraction form
    89.98/134.90 = 44.32/x
  3. Step 3: Cross multiply
    89.98x = 134.90 × 44.32
  4. Step 4: Simplify right side
    89.98x = 5,978.77
  5. Step 5: Solve for x
    x = 5,978.77/89.98
  6. Step 6: Final answer
    x = 66.45

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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.