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Finding the Fourth Proportional to 61.56, 84.92 and 45.23

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Solution

The fourth proportional to 61.56, 84.92 and 45.23 is: 62.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.56 : 84.92 = 45.23 : x
  2. Step 2: Convert to fraction form
    61.56/84.92 = 45.23/x
  3. Step 3: Cross multiply
    61.56x = 84.92 × 45.23
  4. Step 4: Simplify right side
    61.56x = 3,840.28
  5. Step 5: Solve for x
    x = 3,840.28/61.56
  6. Step 6: Final answer
    x = 62.38

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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.