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Finding the Fourth Proportional to 64.62, 96.21 and 61.47

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Solution

The fourth proportional to 64.62, 96.21 and 61.47 is: 91.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.62 : 96.21 = 61.47 : x
  2. Step 2: Convert to fraction form
    64.62/96.21 = 61.47/x
  3. Step 3: Cross multiply
    64.62x = 96.21 × 61.47
  4. Step 4: Simplify right side
    64.62x = 5,914.03
  5. Step 5: Solve for x
    x = 5,914.03/64.62
  6. Step 6: Final answer
    x = 91.52

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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.