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Finding the Fourth Proportional to 72.62, 109.32 and 62.18

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Solution

The fourth proportional to 72.62, 109.32 and 62.18 is: 93.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.62 : 109.32 = 62.18 : x
  2. Step 2: Convert to fraction form
    72.62/109.32 = 62.18/x
  3. Step 3: Cross multiply
    72.62x = 109.32 × 62.18
  4. Step 4: Simplify right side
    72.62x = 6,797.52
  5. Step 5: Solve for x
    x = 6,797.52/72.62
  6. Step 6: Final answer
    x = 93.60

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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.