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Finding the Fourth Proportional to 64.13, 96.14 and 43.86

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Solution

The fourth proportional to 64.13, 96.14 and 43.86 is: 65.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.13 : 96.14 = 43.86 : x
  2. Step 2: Convert to fraction form
    64.13/96.14 = 43.86/x
  3. Step 3: Cross multiply
    64.13x = 96.14 × 43.86
  4. Step 4: Simplify right side
    64.13x = 4,216.81
  5. Step 5: Solve for x
    x = 4,216.81/64.13
  6. Step 6: Final answer
    x = 65.75

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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.