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Finding the Fourth Proportional to 67.60, 93.25 and 64.59

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Solution

The fourth proportional to 67.60, 93.25 and 64.59 is: 89.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.60 : 93.25 = 64.59 : x
  2. Step 2: Convert to fraction form
    67.60/93.25 = 64.59/x
  3. Step 3: Cross multiply
    67.60x = 93.25 × 64.59
  4. Step 4: Simplify right side
    67.60x = 6,022.39
  5. Step 5: Solve for x
    x = 6,022.39/67.60
  6. Step 6: Final answer
    x = 89.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.