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Finding the Fourth Proportional to 66.44, 99.26 and 58.64

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Solution

The fourth proportional to 66.44, 99.26 and 58.64 is: 87.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.44 : 99.26 = 58.64 : x
  2. Step 2: Convert to fraction form
    66.44/99.26 = 58.64/x
  3. Step 3: Cross multiply
    66.44x = 99.26 × 58.64
  4. Step 4: Simplify right side
    66.44x = 5,819.82
  5. Step 5: Solve for x
    x = 5,819.82/66.44
  6. Step 6: Final answer
    x = 87.60

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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.