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Finding the Fourth Proportional to 64.21, 88.68 and 58.75

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Solution

The fourth proportional to 64.21, 88.68 and 58.75 is: 81.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.21 : 88.68 = 58.75 : x
  2. Step 2: Convert to fraction form
    64.21/88.68 = 58.75/x
  3. Step 3: Cross multiply
    64.21x = 88.68 × 58.75
  4. Step 4: Simplify right side
    64.21x = 5,209.95
  5. Step 5: Solve for x
    x = 5,209.95/64.21
  6. Step 6: Final answer
    x = 81.14

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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.