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Finding the Fourth Proportional to 64.76, 89.31 and 50.18

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Solution

The fourth proportional to 64.76, 89.31 and 50.18 is: 69.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.76 : 89.31 = 50.18 : x
  2. Step 2: Convert to fraction form
    64.76/89.31 = 50.18/x
  3. Step 3: Cross multiply
    64.76x = 89.31 × 50.18
  4. Step 4: Simplify right side
    64.76x = 4,481.58
  5. Step 5: Solve for x
    x = 4,481.58/64.76
  6. Step 6: Final answer
    x = 69.20

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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.