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Finding the Fourth Proportional to 67.65, 93.26 and 64.49

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Solution

The fourth proportional to 67.65, 93.26 and 64.49 is: 88.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.65 : 93.26 = 64.49 : x
  2. Step 2: Convert to fraction form
    67.65/93.26 = 64.49/x
  3. Step 3: Cross multiply
    67.65x = 93.26 × 64.49
  4. Step 4: Simplify right side
    67.65x = 6,013.55
  5. Step 5: Solve for x
    x = 6,013.55/67.65
  6. Step 6: Final answer
    x = 88.89

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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.