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Finding the Fourth Proportional to 109.41, 151.07 and 72.62

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Solution

The fourth proportional to 109.41, 151.07 and 72.62 is: 100.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.41 : 151.07 = 72.62 : x
  2. Step 2: Convert to fraction form
    109.41/151.07 = 72.62/x
  3. Step 3: Cross multiply
    109.41x = 151.07 × 72.62
  4. Step 4: Simplify right side
    109.41x = 10,969.58
  5. Step 5: Solve for x
    x = 10,969.58/109.41
  6. Step 6: Final answer
    x = 100.26

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.