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Finding the Fourth Proportional to 66.02, 98.56 and 65.58

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Solution

The fourth proportional to 66.02, 98.56 and 65.58 is: 97.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.02 : 98.56 = 65.58 : x
  2. Step 2: Convert to fraction form
    66.02/98.56 = 65.58/x
  3. Step 3: Cross multiply
    66.02x = 98.56 × 65.58
  4. Step 4: Simplify right side
    66.02x = 6,463.56
  5. Step 5: Solve for x
    x = 6,463.56/66.02
  6. Step 6: Final answer
    x = 97.90

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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.