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Finding the Fourth Proportional to 64.75, 96.62 and 56.11

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Solution

The fourth proportional to 64.75, 96.62 and 56.11 is: 83.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.75 : 96.62 = 56.11 : x
  2. Step 2: Convert to fraction form
    64.75/96.62 = 56.11/x
  3. Step 3: Cross multiply
    64.75x = 96.62 × 56.11
  4. Step 4: Simplify right side
    64.75x = 5,421.49
  5. Step 5: Solve for x
    x = 5,421.49/64.75
  6. Step 6: Final answer
    x = 83.73

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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.