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Finding the Fourth Proportional to 64.21, 95.63 and 60.32

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Solution

The fourth proportional to 64.21, 95.63 and 60.32 is: 89.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.21 : 95.63 = 60.32 : x
  2. Step 2: Convert to fraction form
    64.21/95.63 = 60.32/x
  3. Step 3: Cross multiply
    64.21x = 95.63 × 60.32
  4. Step 4: Simplify right side
    64.21x = 5,768.40
  5. Step 5: Solve for x
    x = 5,768.40/64.21
  6. Step 6: Final answer
    x = 89.84

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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.