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Finding the Fourth Proportional to 64.34, 88.91 and 47.94

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Solution

The fourth proportional to 64.34, 88.91 and 47.94 is: 66.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.34 : 88.91 = 47.94 : x
  2. Step 2: Convert to fraction form
    64.34/88.91 = 47.94/x
  3. Step 3: Cross multiply
    64.34x = 88.91 × 47.94
  4. Step 4: Simplify right side
    64.34x = 4,262.35
  5. Step 5: Solve for x
    x = 4,262.35/64.34
  6. Step 6: Final answer
    x = 66.25

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Why These Related Problems?

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