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Finding the Fourth Proportional to 64.61, 96.87 and 39.08

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Solution

The fourth proportional to 64.61, 96.87 and 39.08 is: 58.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.61 : 96.87 = 39.08 : x
  2. Step 2: Convert to fraction form
    64.61/96.87 = 39.08/x
  3. Step 3: Cross multiply
    64.61x = 96.87 × 39.08
  4. Step 4: Simplify right side
    64.61x = 3,785.68
  5. Step 5: Solve for x
    x = 3,785.68/64.61
  6. Step 6: Final answer
    x = 58.59

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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.