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Finding the Fourth Proportional to 67.50, 92.94 and 56.58

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Solution

The fourth proportional to 67.50, 92.94 and 56.58 is: 77.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.50 : 92.94 = 56.58 : x
  2. Step 2: Convert to fraction form
    67.50/92.94 = 56.58/x
  3. Step 3: Cross multiply
    67.50x = 92.94 × 56.58
  4. Step 4: Simplify right side
    67.50x = 5,258.55
  5. Step 5: Solve for x
    x = 5,258.55/67.50
  6. Step 6: Final answer
    x = 77.90

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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.