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Finding the Fourth Proportional to 72.05, 108.49 and 62.15

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Solution

The fourth proportional to 72.05, 108.49 and 62.15 is: 93.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.05 : 108.49 = 62.15 : x
  2. Step 2: Convert to fraction form
    72.05/108.49 = 62.15/x
  3. Step 3: Cross multiply
    72.05x = 108.49 × 62.15
  4. Step 4: Simplify right side
    72.05x = 6,741.96
  5. Step 5: Solve for x
    x = 6,741.96/72.05
  6. Step 6: Final answer
    x = 93.57

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.