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Finding the Fourth Proportional to 64.33, 88.25 and 61.18

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Solution

The fourth proportional to 64.33, 88.25 and 61.18 is: 83.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.33 : 88.25 = 61.18 : x
  2. Step 2: Convert to fraction form
    64.33/88.25 = 61.18/x
  3. Step 3: Cross multiply
    64.33x = 88.25 × 61.18
  4. Step 4: Simplify right side
    64.33x = 5,398.61
  5. Step 5: Solve for x
    x = 5,398.61/64.33
  6. Step 6: Final answer
    x = 83.92

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.