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Finding the Fourth Proportional to 65.02, 97.02 and 54.90

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Solution

The fourth proportional to 65.02, 97.02 and 54.90 is: 81.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.02 : 97.02 = 54.90 : x
  2. Step 2: Convert to fraction form
    65.02/97.02 = 54.90/x
  3. Step 3: Cross multiply
    65.02x = 97.02 × 54.90
  4. Step 4: Simplify right side
    65.02x = 5,326.40
  5. Step 5: Solve for x
    x = 5,326.40/65.02
  6. Step 6: Final answer
    x = 81.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.