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Finding the Fourth Proportional to 68.19, 102.51 and 66.03

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Solution

The fourth proportional to 68.19, 102.51 and 66.03 is: 99.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.19 : 102.51 = 66.03 : x
  2. Step 2: Convert to fraction form
    68.19/102.51 = 66.03/x
  3. Step 3: Cross multiply
    68.19x = 102.51 × 66.03
  4. Step 4: Simplify right side
    68.19x = 6,768.74
  5. Step 5: Solve for x
    x = 6,768.74/68.19
  6. Step 6: Final answer
    x = 99.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.