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Finding the Fourth Proportional to 68.67, 102.47 and 58.50

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Solution

The fourth proportional to 68.67, 102.47 and 58.50 is: 87.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.67 : 102.47 = 58.50 : x
  2. Step 2: Convert to fraction form
    68.67/102.47 = 58.50/x
  3. Step 3: Cross multiply
    68.67x = 102.47 × 58.50
  4. Step 4: Simplify right side
    68.67x = 5,994.20
  5. Step 5: Solve for x
    x = 5,994.20/68.67
  6. Step 6: Final answer
    x = 87.29

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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.