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Finding the Fourth Proportional to 71.52, 98.55 and 67.02

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Solution

The fourth proportional to 71.52, 98.55 and 67.02 is: 92.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.52 : 98.55 = 67.02 : x
  2. Step 2: Convert to fraction form
    71.52/98.55 = 67.02/x
  3. Step 3: Cross multiply
    71.52x = 98.55 × 67.02
  4. Step 4: Simplify right side
    71.52x = 6,604.82
  5. Step 5: Solve for x
    x = 6,604.82/71.52
  6. Step 6: Final answer
    x = 92.35

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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.