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Finding the Fourth Proportional to 67.24, 92.71 and 56.31

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Solution

The fourth proportional to 67.24, 92.71 and 56.31 is: 77.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.24 : 92.71 = 56.31 : x
  2. Step 2: Convert to fraction form
    67.24/92.71 = 56.31/x
  3. Step 3: Cross multiply
    67.24x = 92.71 × 56.31
  4. Step 4: Simplify right side
    67.24x = 5,220.50
  5. Step 5: Solve for x
    x = 5,220.50/67.24
  6. Step 6: Final answer
    x = 77.64

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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.